Changes in biodiversity are caused by a range of drivers. A driver
1x is any natural or human-induced factor that directly or indirectly causes a change in an ecosystem. The graph pictured shows the
impact of drivers on the biodiversity of different biomes. The cell color indicates the impact to date of each driver on biodiversity in each biome over the past 50-100 years. The arrows indicate the trend in the impact of the driver on biodiversity. Horizontal arrows indicate a continuation of the current level of impact; diagonal and vertical arrows indicate progressively increasing trends in impact. Consider the polar biome. Which driver is having the greatest impact on the biodiversity of this biome?
1x
A
overexploitation
1x
B
pollution
1x
C
climate change
1x
D
habitat change
The polar bear is one of the 10 most endangered species in the
×
US, critically threatened by the effects of human population. A polar bear is fit to swim 100 miles for food, in search of mates or,
more recently, just some ice to stand on. With five inches of blubber keeping this enormous bear prepared for subzero temperatures, the largest member of the bear family has remarkably adapted to Arctic conditions.
Based on the biodiversity data offered in the graph and what you know of human impacts on the environment, what is most likely to the greatest threat to polar bears?
1x
A
Polar bears are losing habitat to expanding human population growth.
x
B
Polar bears are nearing extinction due to the extreme impacts that human-caused climate change has had on the Arctic.
1x
C
Polar bears are losing food sources due to overfishing in the area.
1x
D
Polar bears are facing extinction due to effects of the ozone hole over the Arctic region.
Answers
1) It is to be noted that the driver is having the greatest impact on the biodiversity of the Polar Biome is "Climate Change" (Option C)
2) Based on the biodiversity data offered in the graph and what you know of human impacts on the environment, the most likely to greatest threat to polar bears is: "Polar bears are nearing extinction due to the extreme impacts that human-caused climate change has had on the Arctic." (Option B)
What is climate change?Long-term changes in temperature and weather patterns are referred to as climate change. These movements may be natural, but human activity has been the primary cause of climate change since the 1800s, mostly owing to the combustion of fossil fuels (such as coal, oil, and gas), which creates heat-trapping gases.
Temperature variations induce changes in rainfall. As a result, storms become more violent and frequent. Flooding and landslides ruin homes and communities while costing billions of dollars.
Cutting down forests to make farms or pastures, or for other purposes, creates emissions because trees release the carbon they have been storing when they are chopped down. Because trees absorb CO2, harming them reduces nature's capacity to keep carbon out of the stratosphere.
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Related Questions
Muscle contractions occur when myofibrils
in the muscle shorten and lengthen to make
the muscle contract and extend. Which
types of muscles use these muscle
contractions?
All muscle types
Only smooth muscles.
Answers
Brainliest is appreciated
What will happen to the mass of a ball if it is moved from Earth to the Moon?
The mass will increase.
The mass will decrease.
The mass will not exist.
The mass will remain the same.
Answers
Answer:
mass remains the same
Explanation:
mass does not change but weight does
which of the following is an example of a lever? [select all that apply] group of answer choices tweezers stapler nut cracker mousetrap
Answers
A lever is a bar or rod that may be rotated about an axis (fulcrum). Levers allow objects to be moved across long distances with little effort. All of the options are considered of as levers.
Tweezers
Stapler
Nut cracker
Mousetrap
What is a Lever?
A lever is a simple machine consisting of a rigid bar that pivots on a fulcrum. It is used to move or lift objects by applying a force at a point along its length. Levers can be used to increase the force applied to an object, as well as to change the direction of the applied force.
Therefore, all the options are correct.
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If you place the letter g under the microscope how would the image look on the field of view
Answers
Answer:
I hope this will help you a lot. it takes me an hour to find this answer.
Tall pea plants are dominant, while short plants are recessive. In a cross between a purebred tall plant and a purebred short plant, the offspring will all be _______ plants.
Tall pea plants are dominant, while short plants are recessive. In a cross between two plants heterozygous for height, the offspring will be both tall and short in a _______ ratio.
Respond to the following based on your reading.
Explain why it's unknown which of two alleles an offspring will obtain from its biological mother or father for a given characteristic.
Reginald Punnett sought to apply the insights obtained by Mendel to explain the laws of inheritance in a structured fashion. What's a Punnett square and how is it used?
You're conducting a science experiment crossing two different purebred mouse strains, which each contain a different variation of the same gene, for two generations. What do you expect to see as the phenotypes of the first generation? The second generation?
How closely do Mendel's insights into dominant and recessive traits match up with the ratios that Punnett calculated in his Punnett squares?
Answers
Assuming complete dominance for all the genes, a) the offspring will all be Tall and heterozygous plants. b) 3:1 ratio. c) Punnett squares are used to combinate the parental gametes and make predictions about the possible genotypes and phenotypes among the progeny. d) First generation 100% heterozygous expressing the dominant phenotype. Second generation: 25% homozygous dominant + 50% heterozygous + 25% homozgous recessive. 75% expressing the dominant phenotype + 25% expressing the recessive phenotype. e) Mendel's insight and Punnett squares match perfectly with the expected ratios.
What are complete dominance and Punnett squares?
Complete dominance is an inheritance pattern that becomes evident in heterozygous individuals. The presence of at least one dominant allele is enougth to hide the expression of the recessive allele. In these cases, the individual expresses the dominant phenotype.
The Punnett square is a graphic representation that shows the different types of gamete combinations according to the alleles involved in a cross.
Punnett square shows the probabilities of getting offspring with different genotypes and their consequent phenotypes.
Tall pea plants are dominant, while short plants are recessive. In a cross between a purebred tall plant and a purebred short plant, the offspring will all be _TALL_ plants.All these plants will be heterozygous and express the dominant phenotype (Tall).
Tall pea plants are dominant, while short plants are recessive. In a cross between two plants heterozygous for height, the offspring will be both tall and short in a _3:1_ ratio.1/4 = 25% of the progeny are expected to be homozygous dominant
2/4 = 50% of the progeny are expected to be heterozygous
1/4 = 25% of the progeny is expected to be homozygous recessive
25% homozygous dominant + 50% heterozygous = 75% dominant phenotype
Punnett squares discriminate parental gametes and combinates them when the columns and the rows meet. The cells where columns and rows meet (gamete combinations) gives the progeny genotypes. Cross: two different purebred mouse strainsParentals) PP x pp
Gametes) P P p p
Punnett square) P P
p Pp Pp
p Pp Pp
F1) 100% heterozygous expressing the dominant phenotype
Parentals) Pp x Pp
Gametes) P p P p
Punnett square) P p
P PP Pp
p Pp pp
F2) Expected Genotypes
1/4 = 25% PP 2/4 = 50% Pp1/4 = 25% pp
Expected Phenotypes
3/4 = 75% Dominant phenotype (PP + Pp)1/4 = 25% Recessive phenotype (pp)Mendel's insights into dominant and recessive traits match up perfectly with the ratios that calculated using a Punnett square.
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the reaction for photosynthesis can be broken down into two reactions (below). indicate which of the following describes reaction 1 and reaction 2. select only one answer choice.
Answers
Endergonic describes reaction 1 and Catabolic describes reaction 2.
What are endergonic and catabolic reactions?
In terms of chemical thermodynamics, an endergonic reaction is one that requires an additional driving force to take place despite the fact that the usual change in free energy is positive. In simple terms, the entire amount of useable energy is negative, resulting in a net negative outcome for the total energy.
Large organic molecules are broken down into smaller molecules during catabolic processes, releasing the energy bound up in the chemical bonds. There are inefficiencies in these energy releases (conversions). The energy released is not equal to the entire energy held within the molecule.
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which of the following statements are false?evolution is just a theory. individuals evolve. evolution explains the origins of life. evolution is controversial among scientists.
Answers
The false statements are individuals evolve , evolution explains the origins of life and evolution is controversial among scientists.
What is evolution?
Evolution is the shift in a biological population's heritable traits over successive generations. These traits are the expressions of genes, which, during reproduction, are handed from parent to offspring. Genetic mutation and recombination cause variation to frequently occur within a population.
When these variations are subjected to evolutionary processes like natural selection (including sexual selection) and genetic drift, certain traits within a population start to become more or less prevalent. This is when evolution happens. The evolutionary pressures that determine whether a trait is common or rare within a population are always shifting, which causes a change in heritable traits to emerge through time. At every level of biological organization, biodiversity has been created as a result of this development.Hence, the false statements are individuals evolve , evolution explains the origins of life and evolution is controversial among scientists.
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What base pair of sequence could be produced correctly and DNA replication
Answers
Answer:
Replication relies on complementary base pairing, that is the principle explained by Chargaff's rules: adenine (A) always bonds with thymine (T) and cytosine (C) always bonds with guanine (G).
Explanation:
Hope it helps have a good day :D
match the muscle fiber component with its description.1. sarcolemma (click to select)2. endomysium (click to select)3. sarcoplasm (click to select)4. myofibril (click to select)
Answers
1. Sarcolemma- Plasma membrane
2. Endomysium- Connective tissue
3. Sarcoplasm- Cytoplasm of a muscle cell
4. Myofibril- Bundle of protein filaments
what is muscle fiber?
One muscle cell makes up each fibre of muscle. They assist in regulating the bodily forces physically.
The basement membrane and endomysial connective tissue encircle the sarcolemma, which is the plasma membrane of the muscle cell. The sarcolemma is an excitable membrane that resembles the membrane of neuronal cells in many ways.
The endomysium, a thin network of connective tissue that surrounds individual muscle fibres and houses the blood vessels and nerves that supply them as well as the proteoglycan matrix for ion flow and metabolic exchange, is made up of connective tissue.
A muscle fiber's cytoplasm is called sarcoplasm. It is a water solution that includes ATP, phosphagens, enzymes, intermediate molecules, and product molecules involved in a variety of metabolic processes.
Long contractile fibres known as myofibrils are arranged in clusters that are parallel to one another along the long axis of myocytes (long single multinucleated cells that combine to form the muscle). On the cell's long axis, the myocytes are arranged parallel to one another.
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Body Planes, Directions, Quadrants and Regions
Draw and label the following:
HELP ME PLEASE
Answers
Labelled diagrams of body planes, directions, quadrants and regions are attached below:
What is body plane?A body plane is an imaginary geometric plane used to divide a body into sections. They are commonly used in both human and animal anatomy to describe the position or orientation of body structures.
The three planes of the body are:
Coronal (frontal) plane that separates the front (anterior) and back (posterior) of the body. Sagittal (longitudinal) plane that separates the left and right sides of the body. Transverse (axial) plane that separates the upper (superior) and lower (inferior) halves of the body.Four Abdominal Quadrants of the body are:
Right Upper QuadrantLeft Upper QuadrantRight Lower QuadrantLeft Lower QuadrantNine Abdominal Divisions
Right HypochondriacLeft HypochondriacEpigastricRight LumbarLeft LumbarUmbilicalRight IliacLeft IliacHypogastricThe five regions of the body are head, neck, torso, upper extremities, and it is the lower extremities. The body of the is also divided by the three imaginary planes and it's known as the sagittal of the plane, coronal plane, and transverse plane.
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empty contents of residents urinary drainage bag and measure and record urine output on an intake and output
Answers
Empty the contents of the resident's urinary drainage bag, measure, and document the urine production as part of the resident's healthcare. Urinary drainage bags should be removed seven days after their initial use.
The following are the instructions for emptying a resident's urinary drainage bag, measuring, and recording urine production (intake and output):
Step 1, introduce yourself to the resident or patient and greet him or her by his/her name.Step 2, explain the procedure to the patient before starting and throughout.Step 3, handle the graduate, urinary drainage bag, or other urine-filled container using gloves, and remember to remove gloves when documenting.Step 4, set a graduate or bed pan on a barrier that has been set on the floor, and then fill the graduate with the drainage bag's contents.Step 5, close and cover the drain after emptying the contents of the urine drainage bag to prevent contamination of the drainage tube.Step6, graduation should be placed on a flat surface that is barrier-protected so that it can be viewed at eye level to acquire measurements.Step 7, after measuring the rinse and dry containers and adding the rinse water to the toilet, empty the urine into the graduate.Step 8, after having clean hands, record the output.Step 9, within +/- 50 ML/cc of the nurse's measurement for the output record.Step 10, notate the output as urine as well as the appropriate time on the i/o form.Step 11, leave the drainage bag and tubing disconnected and the bag dangling from the bed frame.Step 12, throughout treatment, keep the urine drainage bag lower than the bladder.Step 13, completing skills, storing equipment, putting dirty laundry in a basket, and garbage removal.Step 14, during care, ask about the patient's preferences.Step 15, when giving care, utilize standard safety precautions and infection prevention methods.Step 16, during care or when it is finished, ask about the patient's comfort or requirements.Step 17, enhance resident rights while providing care.Learn more about urinary retention here: brainly.com/question/28313637
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Why is there life
around hydrothermal
vents on the ocean
floor?
the air is warmer and has extreme concentrations of
solved minerals
it provides protection from large organisms in the open
an
there is more oxygen to photosynthesize
the vent provides light for organisms
Answers
Answer:
There is life around hydrothermal vents on the ocean floor because the vents provide a source of energy and nutrients that support a diverse community of organisms. Hydrothermal vents are underwater geysers that spew hot, mineral-rich water into the surrounding ocean. The vents are typically found along the mid-ocean ridges, where tectonic plates are spreading apart and magma is rising to the surface.
One reason why there is life around hydrothermal vents is that the hot, mineral-rich water that flows from the vents provides a source of energy and nutrients for the organisms that live there. The water from the vents contains dissolved chemicals and minerals, such as sulfur, hydrogen, and methane, which can be used by certain bacteria and other organisms as a source of food.
Another reason why there is life around hydrothermal vents is that the vents provide a habitat that is protected from larger predators and other threats. The vents are typically located in deep ocean waters, far from the light of the sun and the reach of most larger animals. This provides a safe and stable environment for the organisms that live around the vents.
A third reason why there is life around hydrothermal vents is that the vents can provide a source of oxygen for photosynthetic organisms. Some of the bacteria and other organisms that live around hydrothermal vents are chemosynthetic, meaning that they use the chemicals and minerals from the vents as a source of energy. These chemosynthetic organisms can produce oxygen as a byproduct of their metabolism, which can be used by photosynthetic organisms that live nearby.
In summary, there is life around hydrothermal vents on the ocean floor because the vents provide a source of energy and nutrients, a protected habitat, and a source of oxygen for photosynthetic organisms. These factors support a diverse community of organisms that live in the vicinity of the vents.
What are the 2 steps of the Krebs Cycle.
*Please help will mark brainliest and 30 points
There can only be 2 steps no more than that!
Answers
The two steps of the Krebs cycle are:
1. The conversion of acetyl-CoA, a molecule produced during glycolysis, into citric acid, a complex molecule that contains three carboxyl groups. This step is catalyzed by the enzyme citrate synthase.
2. The breakdown of citric acid into smaller molecules, releasing energy in the form of ATP and generating byproducts such as carbon dioxide and water. This step involves a series of reactions that are catalyzed by a series of enzymes, including isocitrate dehydrogenase, alpha-ketoglutarate dehydrogenase, succinyl-CoA synthetase, and others. These reactions also produce NADH and FADH2, which are used in the electron transport chain to generate additional ATP.
which eye disorder has the following characteristics? eyeball is taller than it is wide. images focus behind the retina rather than on it. hyperopia retinoblastoma myopia glaucoma
Answers
Myopia is the disorder that has the above mentioned characteristics.
What is myopia?
Myopia, also known as nearsighted, is a disorder wherein close objects appear clearly whereas far objects don’t.
Objects faraway tend to appear blurry. Myopia may develop rapidly or gradually.
Myopia occurs when the eyeball grows too large from front to back, or when there are problems in the shape of the lens or cornea.
Myopia can last for years or even be lifelong.
Therefore, myopia is the disorder wherein the eyeball is taller than it is wide and images are focused behind the retina rather than on it.
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a(n) blankis a stretch of dna consisting of an operator, a promoter, and genes for a related set of proteins, usually making up an entire metabolic pathway.
Answers
An operon is astretching of DNA consisting of an operator, a promoter , and genes for a related set of proteins , usually making up an entire metabolic pathway.
What do you mean by operon?
In hereditary qualities, an operon is a working unit of DNA containing a group of qualities heavily influenced by a solitary advertiser. The qualities are deciphered together into a mRNA strand and either interpreted together in the cytoplasm, or go through joining to make monocistronic mRNAs that are deciphered independently, for example a few strands of mRNA that each encode a solitary quality item. The aftereffect of this is that the qualities contained in the operon are either communicated together or not by any stretch. A few qualities should be co-deciphered to characterize an operon.
Initially, operons were remembered to exist exclusively in prokaryotes (which incorporates organelles like plastids that are gotten from microbes), however since the revelation of the first operons in quite a while in the mid 1990s, more proof has emerged to recommend they are more normal than recently expected. As a rule, articulation of prokaryotic operons prompts the age of polycistronic mRNAs, while eukaryotic operons lead to monocistronic mRNAs.
Operons are additionally found in infections like bacteriophages. For instance, T7 phages have two operons. The primary operon codes for different items, including an exceptional T7 RNA polymerase which can tie to and translate the subsequent operon. The subsequent operon incorporates a lysis quality intended to make the host cell burst.
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A operon is a stretch of DNA which contains a cluster of genes which are transcribed and translated together to produce a related set of proteins.
What is metabolic?
Metabolism is the set of life-sustaining chemical reactions that take place in cells. These reactions allow organisms to grow and reproduce, maintain their structures, and respond to their environments. Metabolism is an important part of the energy flow within living organisms, as biochemical reactions convert food and oxygen into energy to power cellular activities. Metabolic pathways involve the breakdown of complex molecules such as carbohydrates and proteins, as well as the synthesis of complex molecules such as lipids and nucleic acids. These pathways can be divided into two main areas: catabolism, which involves the breakdown of molecules, and anabolism, which involves the synthesis of molecules. Metabolism also includes the regulation of these pathways and the process of energy transfer.
It usually consists of an operator, a promoter, and genes for a related set of proteins, usually making up an entire metabolic pathway. The operator is a specific DNA sequence which binds a transcription factor, and the promoter is a specific DNA sequence which binds the RNA polymerase enzyme. Together, the operator and promoter control the transcription of the genes in the operon, allowing for the coordinated production of the related proteins.
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Active transport is a way for molecules to move across the plasma membrane. When active transport is used what is required?
Answers
It is transported across the plasma membrane with the help of the energy molecules. It is the transport ions and the transport molecules that help to facilitate the transport.
What is the structure of a plasma membrane ?It is the bi layer of lipids with the association of proteins in it.
ATP that are the energy molecules called as energy currencies as well. It is the molecule of the energy that helps in the transportation of molecules through it. The ATP is broken down into the ADP with the Pi ion and this breakdown gives out the energy libation for the reaction.
Active transport does require the cellular energy in order to achieve the movement. There are 2 types of the active transport : primary active transport which uses the adenosine triphosphate (ATP) and secondary active transport which uses the electro chemical gradient.
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See image below about Punnet Square completion.
Answers
Jules is a young up-and-coming female executive who seems to be prioritizing her work,
then family, then friends. Ben is a semi-retired male who prioritizes his health, cognitive
fitness, and relationships. Which theory would best describe how their life goals and
personal life investments vary based on age?
Lifestyle Diversity
Selective Optimization with Compensation Theory
Integrity v. Despair
Ageism
Answers
The theory which would best describe how their life goals and personal life investments vary based on age is Selective Optimization with Compensation Theory which is therefore denoted as option B.
What is Selective Optimization with Compensation Theory ?This is referred to as a type of strategy which is characterized by individuals optimizing their abilities. Thus therefore leads to the improvement of health and well being in older adults and a model for successful aging.
This theory also depicts how their life goals and personal life investments vary based on age as a result of the differences in the priorities set by people.
In this scenario, Ben who is a semi-retired male who prioritizes his health, cognitive fitness, and relationships which led to him being successful.
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using the following graph, which of the following is a correct statement? insulin infusion affected not only glucose concentration in patients with diabetes but also affected their glucagon concentration. at 220 minutes after a meal glucagon concentration is decreasing as insulin concentration is increasing. before the insulin infusion the blood glucose concentration after 60 minutes in patients with diabetes was equivalent to the blood glucose concentration in patients without diabetes. at 60 minutes when the glucose and glucagon concentrations are at their highest level,the insulin concentrations whereat their lowest in patients without diabetes.
Answers
The human body depends on a strict management of its blood glucose levels to ensure appropriate physiological function.
The signalling system for insulin secretion
An exocrine and endocrine organ,
the pancreas By secreting a variety of digestive enzymes and pancreatic hormones, the pancreas plays important functions in the regulation of macronutrient digestion and subsequently metabolism and energy homeostasis. It is divided into a head, body, and tail and is situated in the left upper abdominal cavity behind the stomach.
What occurs to glucose as insulin levels rise?
Insulin circulates at low levels continuously throughout the body. The liver absorbs glucose and converts it to glycogen when insulin levels climb, alerting the liver that the body's blood glucose level is also elevated.
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Will a continental polar air mass most likely be found north or south of a front in the central United States, east of the Rock Mountains? Will
a maritime tropical air mass like north or south of the front?
Answers
Answer: Continental polar (cP): Cold and dry, but not as cold as Arctic air masses. These usually form farther to the south and often dominate the weather picture across the USA during winter. Continental polar masses do form during the summer, but usually influence only the northern USA.
Explanation:
a postmenopausal client wishes to increase the amount of vitamin d that she consumes to help keep her bones strong
Answers
A food which can support the client wishes is milk. Because milk has rich amount vitamin D which help to strengthen the bones.
Which drink is best for bones?Beverage that are best to help strengthen the bones, is beverages that include calcium and vitamin D-fortified juices, plain or chocolate milk, or flavored waters. The food that good for bones are tomato products, prunes, raisins, potatoes, spinach, sweet potatoes, papaya, oranges, orange juice, bananas and plantains. Red peppers, green peppers, oranges, grapefruits, broccoli, strawberries, brussels sprouts, papaya and pineapples.Calcium and vitamin D are the two nutrients that are most crucial for bone health and fracture healing. Both are abundant in milk, but there are also numerous other dietary sources.Learn more about bone strengthening here: brainly.com/question/12060694
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correct answers only please
Answers
If cells only would enter into interphase and they would bypass the cell division process then it would lead to unbalanced cells and many duplications in the genetic material which eventually would lead to cell death.
What is the real importance of the cell cycle for a multicellular organism?
The real importance of the cell cycle for a multicellular organism is based on the fact that it allows to the cell maintain constant its genetic material as well as other structural components in the cell, which is a fundamental issue to carrying out normal metabolic functions since unbalanced genomes may lead to faulty gene expression patterns.
Therefore, with this data, we can see the real importance of the cell cycle for a multicellular organism is to maintain normal conditions and the survival of the cell since unbalanced gene expression would lead to cell death.
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Which of the following creates
variation through fertilization
and random combining of genetic
information?
A. lateral gene transfer
B. evolution
C. mutations
D. sexual reproduction
Answers
sexual reproduction creates variation through fertilization and random combining of genetic information option (D) is correct
what is sexual reproduction?A gamete with one set of chromosomes interacts with another gamete to create a zygote, which then grows into an organism made up of cells with two sets of chromosomes. Sexual reproduction is a type of reproduction that entails a complex life cycle.
types of reproductionAsexual and sexual reproduction are the two different types of reproduction. Sexual reproduction better fosters genetic diversity through novel allele combinations during meiosis and fertilization, despite the fact that asexual reproduction is quicker and more energy-efficient.
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There is a freshwater lake in the United States that heavily relies on the fishing industry to support its economy. A local aquarium decided to import some Asian shrimp to sell as pets. Unfortunately, during delivery, some boxes full of shrimp fell off the delivery truck into the water.
The Asian shrimp is bigger than most native U.S. shrimp species. It also has a large appetite and feeds on other shrimp, fish eggs, mollusks, and aquatic plants. There are no predators that would eat Asian shrimp in this lake.
Based on the text passage above, answer the following questions.
After the accident, will native shrimp populations increase or decrease?
How will this affect other freshwater species in the lake, like fish and mollusks and the aquatic plant life?
Overall, will this new, foreign species increase or decrease the biodiversity and health of this ecosystem?
Your answer should include at least three complete sentences.
Answers
The answers include the following:
The native shrimp population will decrease. This will also bring about a reduction in the freshwater species in the lake, like fish and mollusks and the aquatic plant life.The new, foreign species will decrease the biodiversity and health of this ecosystem.What is Population?This is referred to as the total number of organisms which are present in an area over a given period of time.
In a situation whereby some asian shrimp fell into the water then it means an increase in competition. Since therefore leads to the reduction in the freshwater species in the lake, like fish and mollusks and the aquatic plant life because it serves as their predator and it has none which is therefore the reason why it was chosen as the correct choice.
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Describe the changes that occur in the groundwater when the human population
increases.
Answers
Answer:
The changes that occur in the groundwater are
The groundwater becomes polluted
The groundwater which has many sewage garbages leads to the smelling of water and can cause many disease
The groundwater gradually evaporates because of ultra violet sun rays as because of increasing pollution the Ozone layer is getting thinner and thinner
Nucleotides contain sugar, a phosphate group, and a nitrogen base. Which of the following is a nitrogen base?
A. Ribose
B. Tyrosine
C. Deoxyribose
D. Guanine
Answers
Nucleotides contain sugar, a phosphate group, and a nitrogen base. Guanine is a nitrogen base.
what are nitrogenous base ?the basic unit of nucleic acid are nitrogenous base, pentose sugar and phosphate. it forms nucleic acid such as DNA and RNA.
nitrogenous base are purine and pyrimidine, these are adenine, guanine, cytosine and thymine, uracil.
Adenine can pair with thymine whereas cytosine can pair with guanine by forming hydrogen bond.
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PLS HELP ASAP RIGHT NOW
Answers
Answer: A pigment called melanin that is produced in the birds cell
Explanation:
PLEASE HELP ME!!
In humans, hemophilia is a sex-linked recessive disorder, which results in an inability for blood to clot, causing people to bleed out. if a man who has hemophilia, marries a woman with no history of hemophilia innher family, show using a punnett square that there is no possibility of having a child with hemophilia.
Answers
Answer:
there is a chance because, babies mostlyncome from the dad since the made the child through his nuts. so the child will go through hemophilia
give two ways that differentiation is the different in plants and animals?
Answers
Answer:
Many types of plants cells retain the ability to differentiate throught life in mature animals cell division is manly restricted to repair and replacement as a cell differentiates it acquires different sub cellular structures to enable it to carry out a certain function. it has become a specialised cell.
You are studying a bacterium that utilizes a sugar called athelose. This sugar can be used as an energy source when necessary. Metabolism of athelose is controlled by the ath operon. The genes of the ath operon code for the enzymes necessary to use athelose as an energy source. You have found the following: The genes of the ath operon are expressed only when the concentration of athelose in the bacterium is high When glucose is absent, the bacterium needs to metabolize athelose as an energy source as much as possible. The same catalbolite activator protein (CAP) involved with the lac operon interacts with the ath operon Based on this information, how is the ath operon most likely controlled? Drag the labels onto the diagram to identify the small molecules and the states of the regulatory proteins. Not all labels will be used.
Answers
First off, the sugar "athelose" is fictitious; it doesn't actually exist and is simply used for demonstration. This is comparable to the lac operon in bacteria, which uses lactose as a source of energy (in the absence of glucose).
Because an active repressor is present and the regulatory gene for producing the enzyme that can metabolise athelose is off (therefore the operon is off), the ath operon (operon for athelose) is repressed in the presence of glucose (can be glucose or a metabolite of glucose; any marker that denotes the presence of high glucose concentrations).
The ath operon is triggered in the absence of glucose because the active repressor, which normally turns the operon off, is absent while glucose is present. Subsequently, the gene encoding the operon-metabolizing enzyme is activated, enabling the bacteria to utilise athelose as an energy source.
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