Answer: Structurally, plant and animal cells are very similar because they are both eukaryotic cells. They both contain membrane-bound organelles such as the nucleus, mitochondria, endoplasmic reticulum, golgi apparatus, lysosomes, and peroxisomes. Both also contain similar membranes, cytosol, and cytoskeletal elements.
Explanation:
Ultraviolet light can be used to kill bacteria in food.TRUEFALSE
The correct answer is TRUE,
What is the meaning of the term plankton? Name two types of plankton
EXPLANATION/ANSWER:
The term "plankton" comes from the Greek word "planktos" which means wandering. Planktons are microscopic organisms that are floating and being carried by tides and currents. There are two types of planktons: phytoplankton and zooplankton. Phytoplanktons are aquatic microorganisms that have chlorophyll and can make food from sunlight. Zooplanktons are aquatic microorganisms that consume phytoplanktons or other zooplanktons.
Which of the following is NOT a consequence of using fossil fuels?A. Copper sulfate is released, contributing to destruction of the Ozone layer.B. Carbon dioxide is released, contributing to global warming.C. Sulfur dioxide is released, contribing to acid rain.D. Ash is released, contributing to solid waste in landfills.
Biology > Ecology > Air pollution
Burning fossil fuels such as gasoline or oil generates numerous pollutants, such as ashes, sulfur and carbon dioxides, which contaminate the environment, affect air quality and contribute to global warming.
One of the compounds not generated during this process is copper sulfates. Therefore, the answer is A.
what is a co factor ?give examples
Answer:
Cofactors are inorganic or small organic molecules that bind enzymes to enable or enhance their activity. Common inorganic cofactors are metals, including but not limited to magnesium, manganese, zinc, molybdenum, cobalt, and copper.
Explanation:
Which of the following choices is a form of asexual reproduction?OOOOfragmentation and regenerationoviparous eggsovoviviparous developmentviviparous development
Fragmentation and regeneration are forms of asexual reproduction.
There are no sexual cells involved, and they divide by mitosis, giving genetically identical individuals.
Is my response to this good is there anything I can change or add to make it better? You now know what an ecosystem is—and how varied ecosystems can be. Pick an ecosystem near you—find one that it as large or small as you wish. All areas—urban, suburban, and rural—have many ecosystems to choose from. Write a description of the ecosystem, including biotic and abiotic factors, in NO MORE THAN FOUR SENTENCES.An ecosystem close to me is a river. Abiotic factors: High water quality and the water is very clear. The average water temperature is 55F, and the water gets a lot of sunlight. Biotic factors: There are many different types of fish, such as bull trout and salmon. Many different kinds of frogs live in and along the edges of the river, and various kinds of plants and algae.
River ecosystem is also referred to as lotic ecosystem. Important descriptions of a river ecosystem includes the temperature, flow of water, floods, sediment transport, river bed features, and structure of habitat. It can also include the geographical area. Biotic factors can include the other plants and animals around the river including the land and aerial animals. Abiotic factors can also include substrate and composition aside from the temperature and light factors you already mentioned.
Mammals that feed on ants and termites evolved independently five times. Although each species is unique, each has evolved powerful front claws, a long hairless snout, and a tongue covered with sticky saliva. These adaptations are useful for hunting and eating insects. This is an example ofA) Puntuacted equilibriumB) GradualismC) Convergent evolutionD) Adaptive radiation
Mammals that feed on ants and termites have similar characteristics because they allow for a greater rate of success in getting this kind of food.
Even when they are not closely related, they share these characteristics because they share the same ecological conditions.
This is an example of convergent evolution, where similar characteristics evolve in distantly related organisms. (C is the right answer)
lWhich of the following are renewable resources?I. WindII. SolarIII. TidalIV. BiomassA. I, II, III, IVB. I, II, and IIIC. II and IIID. I, II, and IV
The renewable resources, that do not run out, but are continually renewed by nature, are:
I. Wind
II. Solar
III. Tidal
But not biomass.
These are the steps that occur during transcription. They are not in the correct order. Write numbers in the blanks indicating the order in which these steps occur.
RNA polymerase reaches the termination signal.
The enzyme, RNA polymerase, binds to a site on the DNA molecule called the promoter.
Complimentary RNA nucleotides are added along the DNA template strand.
The RNA strand is released and travels to the cytoplasm.
RNA polymerase separates the DNA strands.
Explanation:
Step 1: Initiation
Initiation is the beginning of transcription. It occurs when the enzyme RNA polymerase binds to a region of a gene called the promoter. This signals the DNA to unwind so the enzyme can ‘‘read’’ the bases in one of the DNA strands. The enzyme is now ready to make a strand of mRNA with a complementary sequence of bases.
Step 2: Elongation
Elongation is the addition of nucleotides to the mRNA strand. RNA polymerase reads the unwound DNA strand and builds the mRNA molecule, using complementary base pairs. During this process, an adenine (A) in the DNA binds to an uracil (U) in the RNA.
Step 3: Termination
Termination is the ending of transcription, and occurs when RNA polymerase crosses a stop (termination) sequence in the gene. The mRNA strand is complete, and it detaches from DNA.
In this process humans would select animals or plants with a trait they desire then breed those organisms to produce more individuals with the desired traits.Natural selectionContaminationInseminationArtificial selection.
The correct answer is Artificial selection.
Humans interfere in the natural process of organisms that they slect the desirable trait for the organisms that they think best will help the organisms to adapt well into their environment.
The restriction enzyme EcoR1 recognizes the DNA sequence GAATTC. Which DNA strands will be cut by
EcoR1?
i. TTCAGGAATTCGGAAACC
AAGTCCTTAAGCCTTTGG
ii. TGAATCGAACCTG
ACTTAGCTTGGAC
iii. TTAAGCGGCCGAATTCAGTCCA
AATTCGCCCGCTTAAGTCAGGT
iv. CAGTAGGATTTCTGTGTC
GTCATCCTAAAGACACAG
EcoR1 creates 4 nucleotide sticky ends with 5' end overhangs of AATT.
These are the two options (i) and (iii) and the red marks indicate how the segment would be cut. So, the correct answer is option (iii)
Please give me brainliest
has warm temperatures and is dominated by grasses
Answer:
Grasslands (?)
Explanation:
You didn't give much context, but grasslands have warm temperatures and are generally dominated by grass--
Tropical grasslands have dry and wet seasons that remain warm all the time.
Temperate grasslands have cold winters and warm summers with some rain.
The most likely answer is tropical grasslands because they are warm all the time. (grasslands is a more open answer)
The digestive process involves two main types of digestion. Identify each one and explain how each works to break down food. Indicate where each type of digestion takes place in the body.
please help need to finish on Friday
The two types of digestion include the following below:
Mechanical digestion - This involves the use of physical methods and force to break down food such as in the mouth.Chemical digestion - This involves enzymatic action to break food down such as in the stomach.What is Digestion?This is referred to as the process in which food is broken down into smaller substances so as to be acted on by enzymes and assimilated into the bloodstream for the optimal functioning of the body.
Mechanical digestion happens in the mouth and it involves processes such as chewing while chemical digestion involves the breakdown of food through enzymatic actions.
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How does dehydrating or drying food help preserve it?A. It decreases the smell so other animals won't come steal itB. Removing the water hinders the ability for chemical reactions, which keeps microbes from growingC. The food becomes smaller and more easily stored.D. This increases the good bacteria to hinder the growth of bad bacteria
Water is needed for all life forms, including microorganisms, removing the water from food to preserve it means the microorganisms cannot perform the chemical reactions needed to consume the food, so the food is preserved for a longer time (option B is the right answer).
In what situation would the allelefrequency of a population NOT change?A. when individuals move into or out of an environmentB. when there is no evolutionC. when mutations create new allelesD. when individuals choose their mates
Answer
B. when there is no evolution
Explanation
Name some structures that come from the brain region of the telencephalon
The telencephalon is formed by four major structures: cerebral cortex (the hemispheres parts of the brain), limbic forebrain (brain part where you can find amigdala), basal ganglia, and the olfactory system. There are also the subcortical structures that includes the hippocampus (part og hippocampal formation in the brain), and amygdala (brain center to regulate memory and others associated functions). The telencephalon is the farthest end of the neural tube, being during the developtment of the organism divided into two structures that will form the cerebral hemispheres. The cerebral cortex is also divided into prefrontal cortex, motor cortex, occipital cortex, and so on.
Explain why giraffes have long necks.In your explanation include the role of the environment, selective pressure, 3 ingredients to Natural Selection, The effect on the population, and allele frequency
Giraffes are believed to have short necks but there was a chance in neck length variations. Some giraffes have a little longer compared to the average length. The main source of nutrition for giraffes is tree leaves. Maybe there was an environmental change that occurred that there was a limited source of leaves and as a result, there were more giraffes than trees; therefore, there is a struggle for existence.
In this event, variation, fitness differences, and inheritance (3 ingredients of natural selection) must occur for the species to survive. Longer necked giraffes are more likely to reach the leaves of the trees and have a higher chance of survival and reproduction; thus, they have greater fitness. This trait (long necks) was passed on to the offspring and eventually, all giraffes have long necks.
The allele frequency of the population of giraffes eventually changes to favor the trait that will give the species a higher chance of survival in their environment.
An organism is born with a genetic abnormality not present in any of its ancestors. This abnormality is most likely the result of?
Genetic diseases or abnormalities can be inherited or a result of a mutation, which is a change in the nucleotide sequence in the DNA of the organism.
Mutations can happen as a result of errors during mitosis or meiosis, as well as by damage from exposure to UV radiation or a chemical substance.
So, the right answer is mutation (option A)
If a couple has a 50% chance of producing an XX chromosome offspring withred-green colour deficiency, what is the genotype of the couple? For thecouple in Q5 (above) what is the percentage chance that their offspring willbe XY with normal colour vision? *note* Please enter numbers only - up to amaximum of 3 digits (0-100)
If the parents have XXrgrg and XYrg genotype, they have a 50% chance of producing an individual XX with red-colour deficiency.
Therefore, their offspring has 0% chance of being XY with normal colour vision.
A scientist is studying the inheritance of two characteristics in plants: red flowers (RR and Rr) , which are dominant to yellow flowers (rr) , and green leaves (GG and Gg) , which are dominant to yellow leaves (gg).She crosses a double heterozygous (RrGg) with a double recessive (rrgg), and expect to see a 1:1:1:1 ratio in the offspring.Instead, she sees these results: Which phenomenon would she hypothesize accounts for the pattern she sees?crossing-overindependent assortmentcytokinesisrespiration
It wouldn't be respiration, because it has no direct relation to procreation. It wouldn't be independent assortment also, because this is the phenomenon that would explain the expected result. It also wouldn't be cytokinesis because this phenomenon is related to cell division, in which the combinations are already set. So, it is crossing-over, because this phenomenon occurs when ther is a switch between homologous chromatids occured during meiosis, which means that the chromosomes are so close to each other that they can trade parts of itselfs with other chromosomes, unexpectedly providing a different outcome than the one that was expected. So, the answer is crossing-over.
Question: What is the mRNA sequence of the Albino Cat? What mutation gave the albino appearance?
DNA SEQUENCE OF NORMAL CAT: CCC TCC TCT GCT
DNA SEQUENCE OF ALBINO CAT: CCT CCT CTG CTG
To change DNA sequence to mRNA sequence, remember uracil replaces thymine in mRNA. A=U; G=C
mRNA SEQUENCE OF NORMAL CAT: GGG AGG AGA CGA
mRNA SEQUENCE OF ALBINO CAT: GGA GGA GAC GAC
The mutation changed the structure of the genes, which changed the structure of the proteins. This changed the function of the genes, which caused the cat to have albino traits.
_________ are groups of organisms with the same genetic code that breed and produce offspring that can breed. AdaptationSpeciesSelectionCommunity
The correct option is species. Species are individuals linked by their reproductive characteristics and often by their evolutionary mechanisms and history.
Cystic fibrosis is caused by an autosomal recessive allele (n). The allele for the normal condition is dominant (N). Two parents appear normal, but the mate has a brother withcystic fibrosis. Which of the following tools will BEST help this family predid their chances of carrying and passing this disease to their offspring?a test Crossa pedigreeO hydrolysisOPunnet SquareBackNexdAll PreviousType here to searchti
The Punnett square is a square diagram that is used to predict the genotypes of a particular cross or breeding experiment. It is named after Reginald C. Punnett, who devised the approach in 1905. The diagram is used by biologists to determine the probability of an offspring having a particular genotype.
Answer: Punnet Square
Though DNA is responsible for the instructions for the assembly process, it is __?__ that synthesizes (assembles) the process.
Though DNA is responsible for the instructions for the assembly process, it is RNA that synthesizes (assemles) the proteins.
What kingdoms of life can have either sexual or asexual reproduction?Plantae, archaea, fungiAnimalia, plantae, and fungiPlantae, protista, and fungiEubacteria, protista, and fungi
We have to consider that sexual and asexual reproduction differs in that the first one requires both organisms, one male and one female, to produce genetically different offspring, while the second one requires only one organism to produce genetically identical offspring.
About the kind of organisms mentioned in the answer options, we can say Protista includes Fungi, so the answer options that include both of them can be excluded, mainly due to choosing one of those options would exclude other organisms that can be in fact sexual or asexual.
Having this clear, we can say that organisms such as those belonging to the Plantae, Fungi, and Animalia kingdoms can reproduce in these two ways (unlike Archaea, and Eubacteria).
In the pictures below we can see examples of organisms of these species that can reproduce both asexually and sexually. In them, we can see ants (which can produce eggs with only the genetic load of one parental organism), plants (which can reproduce through branches, but also through seeds), and fungi (which can reproduce also mitotically and meiotically), as in the second answer option.
The researcher collects and crosses male and female flies from the F1 generation. In the resulting offspring (F2 generation), there are both stubble and ebony flies.How do I Draw a Punnett square to illustrate the F1 cross for the stubbly phenotype showing the individual gametes of each parent, and the combination in the resulting offspring.
Recessive allele: Ebony and stubble bristles.
We take it as
ssee- the small letter will show that it is recessive.
When a population is growing as fast as possible, it has reached its ___________.A. Carrying CapacityB. Competitive ExclusionC. Allele FrequencyD. Biotic Potential
General category: Biology.
Sub-category: Ecology
Topic: Population growth
Introduction:
The Biotic potential is described by the unrestricted growth of populations. This event causes the maximum growth of that population.
Explanation:By definition, when a population reaches the biotic potential, then the species has its highest birthrate or a high number of births or accelerated population growth and lowest mortality rate.
we can conclude that the correct answer is:
Answer:D. Biotic Potential
Why do we use onion root tips and whitefish embryos to view mitosis?
Cells divide for three reasosn: growth, reproduction and repair.
Onion root tips and whitefish embryos presents cells that's always undergoing mitosis.
Onion root tips are always growing to get more water and nutrients from the soil, therefore mitosis is always occuring to duplicate the cells and maintain a growing rate.
Whitefish embryos have cells that are undergoing mitosis rapidly, as it is a phase of intense growing and formation of the embryos to become fish.
A net force of 10 N accelerates a box at 5 m/s2^? What is the mass of the box?
The mass of the box is 2 kg.
According to Newton's second law, the force acting on a body is the product of its mass of the body and acceleration produced due to the force. i.e.,
[tex]F=ma[/tex],
where, [tex]F[/tex] is the force acting on the body, [tex]m[/tex] is the mass of the body and [tex]a[/tex] is the acceleration.
Now, as per the question:
Force, [tex]F=10 N[/tex]
Acceleration, [tex]a=5m/s^{2}[/tex]
Thus, the mass of box ,
[tex]m=\frac{F}{a}[/tex]
[tex]m=\frac{10}{5}[/tex]
[tex]= 2 kg[/tex]
Therefore, the mass of box is [tex]2 kg.[/tex]
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I need the answer to this question A.Or B.OrC.Or D
The endosymbiotic theory states that some organelles in eukaryotic cells are original from prokaryotic microbes (bacteria), being mitochondria and chloroplast the example of the theory. Therefore, for the students demonstrate the endosymbiotic theory with the biological material that was offered to them they have to show the big bacteria ingesting the small one.