The cell membrane is selectively permeable, allowing water but not the solutes to pass through because (D) the cell will shrivel because of the active transport of water.
Osmosis is the process by which solvent molecules move from a lower concentration to a higher concentration, or from a less concentrated solution to a highly concentrated solution, over a semipermeable membrane. The osmosis process involves the movement of water. Water travels passively from a lower concentration of solute to a high solute concentration during the osmosis process.
Osmosis is another name for the diffusion of water or a solvent through a membrane, which only permits specific substances to pass through the channel. Osmosis is a passive process, thus ATP is not needed for it to take place.
The active movement of water will cause the cell to shrink as a result. Option D is correct as a result.
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what is the name of the process through which polypeptides, polysaccharides, or triglycerides are catabolisez
It is known as hydrolysis when polypeptides, polysaccharides, or triglycerides are broken down.
Condensation and hydrolysis have the same meaning in biology as they have in chemistry. As far as my understanding goes, hydrolysis is typically and most frequently utilized to break down ester connections in lipids, glycosidic bonds in polysaccharides, and peptide bonds in polypeptide molecules. For the opposite result, condensation reactions take place. In any class of carbohydrates, polysaccharides are molecules that include chains of monosaccharide units. Among polysaccharides include starch, glycogen, and cellulose. Proteins are a kind of polypeptide, which is a molecule consisting of long chains of amino acids.
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what is the function of the spleen? group of answer choices tissue repair hematopoiesis red blood cell and platelet destruction blood reservoir all of the above
In the top left side of your abdomen, behind your left ribs, and next to your stomach, is an organ the size of your fist called the spleen. Despite being a crucial component of your immune system, you are nonetheless capable of surviving without it. This is due to the fact that the liver may perform many of the spleen's duties.
Cellular waste and old or damaged blood cells are removed from the blood as it is filtered. Create antibodies and white blood cells to aid in the body's defense against illness. Helps keep your body's fluid levels stable. Produces antibodies that can defend you against infection. Rapid satiety following a meal (an enlarged spleen can press on the stomach).
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Which of the following is example of chemical mutagen *?
This chemical mutagen includes substances like salt, Sodium azide, and ethyl methanesulfonate. Here option C is the correct answer.
A monofunctional ethylating agent called ethyl methanesulfonate has been shown to be mutagenic in a range of genetic test systems, including viruses and mammals. Additionally, it has been demonstrated to cause cancer in animals.
One of the most potent chemical mutagens in agricultural plants has been sodium azide. The development of an organic metabolite of the azide molecule mediates the mutagenicity. This metabolite enters the nucleus, interacts with the DNA, and alters the genome at a specific location.
Strong mutagens include a class of very poisonous substances called vesicants, of which mustard gas is the best-known example.
Complete question:
Which of the following is a chemical mutagen?
A - Ethyl methane sulphonate and X-rays
B - Sodium azide and UV rays
C - Ethyl methanesulphonate and Sodium azide
D - X-rays, gamma rays, and UV rays
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The cell membrane encloses the cell contents"
What are the major properties of the cell membrane?
Answer:
Cell membranes are crucial to the life of the cell. The plasma membrane encloses the cell, defines its boundaries, and maintains the essential differences between the cytosol and the extracellular environment.
(1) Cell membranes are thin enclosures that form closed boundaries. (2) Cell membranes are made up of lipids, proteins and carbohydrates. (3) Cell membranes consists of a phospholipid bilayer. (4) Cell membranes are held together by non-covalent interactions (5) Membranes are fluid-like structure
what is the structure of prokayotic cells
The bending of a tip link protein leads to depolarization of the hair cell by allowing _____________ ions go diffuse across the membrane into the cell.
The bending of a tip link protein leads to depolarization of the hair cell by allowing Potassium ions go diffuse across the membrane into the cell.
Potassium has the chemical symbol K and the atomic number 19. Potassium is a silvery-white metal that may be sliced with a knife with little effort. In seconds, potassium metal interacts with ambient oxygen to generate flaky white potassium peroxide.
Potassium can be found naturally in many foods as well as as a supplement. Its primary function in the body is to assist maintain normal fluid levels within our cells. Its counterpart, sodium, maintains proper fluid levels outside of cells. Potassium also aids muscle contraction and maintains normal blood pressure.
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classify the following traits as specific to either cells or viruses, or shared by both.
a. contain genetic material capable of undergoing evolution by natural selection
b. contain genetic material protected by a protein coat c. can actively respond to environmental stimuli d. can contain organelles that are bound by membranes e. require a host to replicate f. can perform biological processes autonomously
1. Unique to cells 2. Unique to viruses
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In their analysis of the ______________ genome, svante pääbo and colleagues found similarities in the remains recovered from southern siberia with living people from populations in ___________ and china.
Swedish geneticist Svante Pääbo For Mem RS is an expert in the study of evolutionary genetics.
He was one of the pioneers of paleogenetic and has put a lot of effort into understanding the Neanderthal DNA. He was appointed the first director of the Max Planck Institute's Department of Genetics in 1997.One of the pioneers of the field of paleogenetic, which uses genetics to investigate early humans and other extinct animals, is Pääbo.He conducted postdoctoral research at the University of Zurich's Institute for Molecular Biology II from 1986 to 1987.Pääbo arrived in the United States in 1987 as an EMBO Postdoctoral Fellow and accepted a position as a postdoctoral researcher in biochemistry at the University of California, Berkeley. He joined Allan Wilson's group and worked on a variety of projects there.To know more about geneticist
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Why do cells need to replicate their DNA before divding?
Answer:
Explanation:
Replication is an essential process because, whenever a cell divides, the two new daughter cells must contain the same genetic information, or DNA, as the parent cell. The replication process relies on the fact that each strand of DNA can serve as a template for duplication.
i. Soybean and maize can grow simultaneously on the same field explain?
ii. What is the main purpose of mixed cropping?
iii. Enlist various methods to control weed, insect, and disease.
Answer:
Explanation:
Planting Soybean and Maize in alternate rows in the same field is called as intercropping will this help (please heart)
Which of the following facts supports the argument that it is unsafe to give antibiotics to mature poultry?
O many consumers avoid products from farms that use antibiotics.
O antibiotics can be passed on to humans through meat and eggs.
O most antibiotics reduce illness and increase performance.
O some commercial feeds contain antibiotics and supplements.
Answer:
option C is right
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Check all that apply when there is an increase in aldosterone secretion in response to an increase in renin by the juxtaglomerular apparatus.
a. Potassium secretion increases.
b. Sodium reabsorption increases.
c. Sodium secretion increases
c. Potassium reabsorption increases.
Aldosterone secretion rises in response to a rise in renin by the juxtaglomerular apparatus an increase in sodium secretion.
What is juxtaglomerular?
The juxtaglomerular apparatus causes an increase in renin, which causes an increase in aldosterone secretion. Aldosterone is a hormone that affects the kidney's tubules to increase sodium and water absorption into the blood; this substance is directly linked to decreased urine production. The juxtaglomerular cells change prorenin to renin when the blood flow to the kidneys is decreased. Angiotensinogen is changed into angiotensin as a result. The frequency of action potentials that flow from the urinary bladder to the sacral region of the spinal cord increases when the urinary bladder is extended. By stimulating paracrinely, macula densa cells instruct granular cells.
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Light passes through the entire thickness of the neural layer of the retina to excite the photoreceptors.true/false
The statement 'light passes through the entire thickness of the neural layer of the retina to excite the photoreceptors' is true.
In the field of biology, the retina can be described as the site of the human eye that absorbs light. Inside the retina, the photoreceptors are present that become excited when light is absorbed.
It is the photoreceptors that transmit the light energy into electrical signals so that they can be carried in the form of impulses to the brain as a signal.
In order for the light to excite the photoreceptors present in the retina, it has to pass through the various levels of neural thickness in the retina. Hence, the statement above is true.
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what is one virulence factor that differentiates staphylococcus aureus from other species of staphylococci? group of answer choices it can produce coagulase. it produces lipase. it has a capsule. it produces catalase. it can live on the surface of the skin and in cutaneous oil glands.
The difference between the staphylococcus aureus from other species of staphylococci is that it can produce coagulase.
Coagulase superb staphylococci are acknowledged human pathogens. Transmission of those organisms happens thru direct touch with colonized or inflamed men and women or thru oblique touch with infected objects. S. aureus is the maximum not unusualplace species on this group; extra species encompass S. lugdunensis and S.
The coagulase take a look at differentiates traces of Staphylococcus aureus from S. epidermidis and different coagulase-bad species. S. aureus traces are commonly able to coagulating EDTA-handled plasma withinside the tube take a look at and could produce clumps of cells withinside the slide testaureus is differentiated from different staphylococci via way of means of the coagulase take a look at.
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What is the relationship between base pairs?
Relationships between base pairs exist as urine adenine (A) always couples with pyrimidine thymine (T), and pyrimidine cytosine (C) always pairs with purine guanine, according to the laws of base pairing (or nucleotide pairing).
Adenine (A), cytosine (C), guanine (G), and thymine (T) are the four nucleotides, or bases, that makeup DNA (T). These bases couple off in certain ways (A with T and G with C). Base pairs are chemically linked to one another within a DNA molecule by hydrogen bonds. The molecule's two strands are joined by these bonds. Complementary base pairing sometimes referred to as Watson-Crick base pairing, is the term used to describe the constant pairing of bases.
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__________ is a highly conserved nucleotide sequence that has been found in developmental regulatory genes in many diverse organisms.
Developmental regulating genes in a wide variety of species have been identified to include the highly conserved nucleotide sequence known as homeobox.
A family of genes known as homeobox genes controls morphogenesis and cell differentiation in multicellular animals. Since their discovery, instances of them have been found in all multicellular species, including fungi and vertebrate animals.
A highly conserved nucleotide sequence known as a homeobox (Hox) has been discovered in developmental regulating genes in a wide range of species. It consists of a 180-base pair DNA sequence that functions as a transcription factor, enabling it to regulate the expression of other genes. It is frequently linked to the regulation of segment identity in animals.
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consider a starch consisting of 25 glucose molecules. the complete hydrolysis of this polysaccharide would result in the production of a) 24 water molecules. b) 25 glucose molecules. c) 24 glucose molecules. d) a and b only e) a and c only
The correct answer is b) 25 glucose molecules. therefore the correct option is the option (b).
The energy-carrying molecule known as ATP provides the energy for active transport (adenosine triphosphate). Transport proteins embedded in the plasma membrane, such as carrier proteins, may also be needed for active transport. Pump and vesicle transport are two kinds of active transport. An oligosaccharide with ten glucose units needs nine water molecules to disintegrate it. Nine glycosidic connections total, one between each pair of neighboring carbohydrate subunits in the polymeric molecule, would be present in such an oligosaccharide. Since two glycosidic connections connect the three glucose moieties in a trisaccharide, two water molecules are required to break this bond and produce three glucose units.
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scientists mate two parrots from different populations to see if speciation has occured. the parrots mate over and over again but the male sperm never fertilizes the female egg. what type of barrier is this
The parrots mate again and again, yet the male sperm never treats the female egg. Mating happens, however, gametes can't join together. This is an illustration of gametic disconnection, a prezygotic reproductive barrier.
Prezygotic barriers keep individuals from various species from mating to create a zygote, a solitary-celled incipient organism. Some model situations are underneath: Two species could favor various territories and consequently be probably not going to experience each other. This is called habitat isolation. Prezygotic barriers are ostensibly the most significant and compelling boundaries, considering that they would act right off the bat in the existing pattern of a creature, force the most grounded obstacle to quality stream, and could forestall exorbitant yet negative mating mixes.
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lucy vs. ape vs. human for this lab you are going to compare lucy (a. afarensis) to an ape and a human. you will first compare the pelvis and femur. then you will compare the skulls. lucy vs. ape lucy vs. human illium shape and length orientation of the illiac blades (do they curve inward, are they flat?) femur is there a bicondylar angle present? what is the orientation of the head of the femur? straight? curved? what is the size of the linea aspera? overall which is lucy more similar to? an ape or a human? what features sup
Lucy's femurs, or thighbones, are angled inward from the hip toward the knee. She is thus able to walk with her feet close together thanks to the direct descent of her shinbones (tibiae) to the earth. According to some experts, Lucy's long arms, which are similar to the pole used by tightrope walkers, may have helped her balance while walking on two legs.
The angle formed by the femur's diaphysis and a line parallel to the infracondylar plane is known as the bicondylar angle. Australopithecus afarensis' femoral bicondylar angle proves that these 3.5 million-year-old hominids were bipedal.
Which bones in the skeleton of Lucy most like those of a chimpanzee?A digital recreation of Lucy's upper arm bone is seen here. The CT images were compared to those of contemporary primates and humans. Her upper limb strength was determined to be closer to that of a chimpanzee than a human, according to specialists.
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if a cell increases the activity of its actin severing proteins, will it lead in the short term to more or less actin polymer mass?
If a cell increases the activity of its actin severing proteins, will it lead in the short term to more or less actin polymer mass. If the concentration of free actin monomers is above the Cc for both the plus and minus ends, then MORE polymers will result. If the concentration of free actin monomers is below the Cc for both the plus and minus ends, then LESS polymer will result.
Actin was first isolated from muscle cells, in which it constitutes approximately 20% of total cell protein, in 1942. Actin is now known to be a very abundant protein (usually 5 to 10% of total protein) in all types of eukaryotic cells, despite the fact that it was formerly believed to be specifically engaged in muscle contraction. While higher eukaryotes have multiple distinct kinds of actin that are encoded by various members of the actin gene family, yeasts only have one actin gene. For instance, mammals have at least six unique actin genes: Two are expressed in non-muscle cells, while four are expressed in various forms of muscle.In 1990, Kenneth Holmes, Wolfgang Kabsch, and their colleagues mapped the three-dimensional architectures of actin filaments and individual actin molecules. The globular proteins that make up individual actin molecules have 375 amino acids (43 kd). Actin monomers polymerize to form filaments because each actin monomer (globular [G] actin) includes tight binding sites that mediate head-to-tail contacts with two other actin monomers (filamentous [F] actin).
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thermogenesis has been studied the plants in the genus arum, including skunk cabbage and the corpse flower. in these plants, what hypotheses have been provided to explain the reason behind thermogenesis? select all that apply
The hypotheses that have been given to explain the reasons behind thermogenesis in the genus Arum are:
protection from frost damageheat source for pollinatorsThermogenesis plants are found in various families, but Araceae contains many of these species. Skunk cabbage, dead horse arum, elephant yam, and Philodendron selloum, are some examples of thermogenic plants belonging to the Araceae family. These plants can generate large amounts of heat that even mammals cannot, and their rate of heat production will increase if they are in a cooler environment.
Thermogenesis plants produce heat to aid in pollination. Heat makes the scent of these flowers more volatile which helps the scent spread more widely so pollinating insects can smell them from afar.
This question has several options
a) protection from frost damage
b) leaf production and photosynthesis.
c) seed germination.
d) heat source for pollinators
c) pollinator attraction.
True choice is A and D
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in animals, what is the difference between reproductive cloning and therapeutic cloning?
Animals are replicated in their entirety through reproductive cloning. In trials aiming at producing tissues to replace damaged or ill tissues, therapeutic cloning creates embryonic stem cells.
The intentional creation of individuals that are genetically similar is known as reproductive cloning. Each freshly created person is a duplicate of the original.
Reproductive cloning creates an animal that is genetically identical to a donor animal utilising somatic cell nuclear transfer. The new generated embryo is returned to the uterus during reproductive cloning so it can implant and develop. Possibly the most famous example is Dolly the sheep.
By transferring dissociated nuclear material from a somatic cell into an enucleated egg, therapeutic cloning aims to establish embryonic cell lines with the same genome as the nuclear donor.
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describe generally how the enzymes might lower the activation energy and ultimately speed up a reaction
The explanation for how enzymes could reduce activation energy and subsequently speed up a process is given below.
The minimal amount of energy needed to activate atoms or molecules so they may go through chemical change or reaction is known as activation energy.They bring the reactants near enough to prevent them from wasting extra energy when they randomly clash.Molecules can interact with less energy by tying reactants to the active site.In order to reduce activation energy, reactions also take place via a different method.The kind of substrate, temperature, ionic concentration, and pH of the environment all affect how an enzyme reacts.Trypsin (pH 8), another enzyme in the digestive tract, breaks protein chains in food into smaller pieces. Digestive enzymes are produced in the acidic environment (low pH) of the stomach to aid in the breakdown of proteins into smaller molecules.
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cystic fibrosis in humans is caused by mutations in a single gene and is inherited as an autosomal (non-sex chromosome) recessive trait. a normal couple has two children. the first child has cystic fibrosis, and the second child is unaffected. what is the probability that the second child is a carrier (heterozygous) for the mutation that causes the disease?
Cystic fibrosis (CF) is an inherited illness. Therefore, CF is inherited. Only when both the mother's and the father's CF genes are inherited will a child be born with the condition. One CF gene is all that is necessary for someone to be healthy and a "carrier" of the condition. A carrier has a higher likelihood of giving birth to a CF-positive child. It is known as "autosomal recessive" inheritance. Males and females are equally affected by the condition because autosomal means the gene is on one of the first 22 pairs of chromosomes, which do not define gender. Recessive refers to the fact that the disorder requires two copies of the gene, one from each parent, to manifest.
A little blood sample or a "cheek swab," which is a brush brushed against the inside of your cheek to collect cells for testing, can be used to test for the CF gene. The majority of laboratories test for between 30 and 100 overall mutations, and they often only test for the most prevalent variants. The ethnic background of the individual affects the detection rate. The detection rate for the Caucasian population is typically 90 percent, the Ashkenazi population is 97 percent or higher, Hispanics are 57 percent, African-Americans are 75 percent, and Asians are 30 percent. Because CF is more prevalent in several geographic regions and populations around the world, the detection rate varies. The results of a second test called the confirm the diagnosis.
Numerous CF patients have mutations that are still unknown. In other words, not all genetic mistakes that lead to the illness have been found. A person can still be a CF carrier even if no mutations were discovered by carrier testing because not all mutations are detectable.
Anyone whose partner is a known CF carrier, has CF, or has a family member with the condition should consider getting tested for the CF gene.
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Muscle fiber features called ___________ are repeating units within muscle fibers that act as the functional units of muscle contraction
Muscle fiber features called Sarcomere are repeating units within muscle fibers that act as the functional units of muscle contraction.
Because the actin and myosin filaments that drive their contraction are arranged into repeating arrays, or sarcomeres, that have a striated microscopic appearance, skeletal and cardiac muscles are known as striated muscles.
What is the purpose of muscle fiber?
Muscle fibers' main function is to regulate the forces that go through the body. The quadriceps and gluteus maximus shorten as the body changes from a seated to a standing position to help the body resist gravity. Similar activities may be used to create force to move a resistance.
Where can you find muscle fiber?
Except for the heart, smooth muscle fibers are spindle-shaped, involuntary, and located in the walls of hollow visceral organs (such as the liver, pancreas, and intestines). Skeletal muscle fibers can be found in muscles that are attached to bones.
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what overall changes in the digestive system appear with age? decreased secretory mechanisms
Our digestive system moves food through our bodies through a series of muscle contractions. As we age, this process can slow down. When that happens, more water from the food is absorbed into the body, which can lead to constipation. Staying hydrated is very important to help prevent constipation.
Ageing can have drastic effects on the functions of the digestive system. One of these is reduced appetite due to changes in hormone production and an alteration in smell and taste. Physiological changes in pharyngeal skills and esophageal motility may lead to dysphagia and reflux.
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Which of these environmental factors is most likely to disrupt a female's
reproductive cycle?
O A. Physical stress
OB. Regular exercise
OC. Regular sleep habits
OD. A balanced diet
Answer:
Option (A)
Explanation:
High levels of physical or emotional stress or exposure to chemicals such as pesticides, polychlorinated biphenyls (PCBs), organic solvents and carbon disulfide, may disrupt the balance.
A cell has 50% solute and 50% solvent. The solution the cell is sitting in has 30% solvent, and 70% solute. What would happen to the cell, if the membrane only allowed diffusion to take place.
From the options ;The cell would crenate, the solvent would move into the solution ( A )
Hello your question is incomplete attached below is the complete question
since the cell has a 50% solute and 50% solvent while the solution where the cell is sitted contains a 30% solvent and a 70% solute. and the cell membrane allows for osmosis. this shows that the solute concentration in the solution is higher than solute concentration in the cell.
The solution is hypertonic ( has a higher solute percentage ) therefore the water ( solvent ) from the cell will move into the solution causing the cell to crenate.
hence we can conclude that the cell would crenate and the solvent would move into the solution
a(n) viral infection involves the rapid replication of the virus, often at the site of infection, which leads to sudden symptom onset.
A(n) acute viral infection includes the virus replicating quickly, frequently at the site of infection, which causes the abrupt onset of symptoms.
Acute viral infections are marked by the fast or quick onset of infections , which can be promptly treated by the host's powerful innate immune responses or, alternatively, may result in the host's death. Acute illnesses are frequently brought on by viruses or infections, but they can also be brought on by injuries sustained in falls or car accidents, or by the abuse of narcotics or pharmaceuticals. The onset of acute infections is abrupt and severe.
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What does socrates do in socrates, condemned to death, addresses his judges, also known as apologia (the apology)? socrates refuses to abandon his course of questioning and challenging answers. Socrates abandons his course of questioning and challenging answers. Socrates deserts his course of questioning and challenging answers. Socrates leaves his course of questioning and challenging answers.
In Socrates, Condemned to Death, Addresses His Judges, also known as Apologia (The Apology), according to my understanding of Socrates, Socrates continues to pose questions and offer challenging responses.
Because of his contributions to the development of ancient Greek philosophy, which paved the path for Western philosophy, Socrates of Athens is regarded as one of the most famous individuals in history. In Socrates, Condemned to Death, Addresses His Judges, commonly known as Apologia (The Apology), Socrates, who is condemned to death, maintains his line of inquiry and challenging responses.
Before the jury, Socrates questions why he should have been so eager to continue his line of philosophical investigation if the resentment it has garnered him has endangered his life. He responds to his own query by stating that the only pertinent consideration while acting is whether or not one is doing justly. In comparison to thoughts of justice, issues of life and death are self-serving and irrelevant.
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