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Irina18 [472]
3 years ago
14

Tammy puts one toe into the swimming pool and shivers because the water is so cold. She grits her teeth and dives in anyway. Aft

er about ten minutes in the water, the temperature seems quite comfortable to her. This example illustrates the principle of:
Biology
1 answer:
nydimaria [60]3 years ago
3 0

Answer: BODY WARMASION

Explanation:

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A large tract of land is purchased by a commercial agricultural company. The land is cleared of its native flora, and a single c
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The native flora will die off and since that single crop would be considered an invasive species to that specific food web so it could kill off any other species of plants or animals that are living/growing there.
5 0
3 years ago
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What is the differences between nuclear DNA and mitochondrial DNA?
oee [108]

Answer:

Believe it or not, mitochondria are their own organisms!

That’s right, they are single celled living beings that hitch a ride inside our cells for security, and in return they make our energy systems run much better than they would. This arrangement started a very long time ago, before we split from our last ancestor with plants, and long before we became multicellular. Other than this arrangement, our DNA has nothing to do with the DNA of the mitochondria (other than synergistic evolution making us more compatible with one another).

For this reason, it is easy to see how mitochondrial DNA differs from nuclear DNA.

First major difference is that we are in different kingdoms and even different super kingdoms to mitochondria (I know there are only meant to be 5 kingdoms but in biology people often use a system based off genetic differences, leading to a huge array of kingdoms that are often really distantly related). So our DNA and mitochondrial DNA share very few similarities. We both replicate our DNA using the same method and have the same base pairs, but the DNA itself says different things.

Another difference is that mitochondria generations are very fast compared to humans’, so their DNA undergoes genetic drift at a much faster rate, and changes more over time. Therefore it is much easier to locate recent changes in populations, for example the migrations out of Africa in the last 200,000 years, or the ethnic backgrounds of different African races, using mitochondrial DNA. In contrast nuclear DNA has fewer fine mutations that can be used as a map for recent events (in the last million years, say).

Mitochondria are passed down from mother to child in animals, so you will always have your mother’s mitochondrial DNA. This is why there is a mitochondrial Eve- this is the last female that is an ancestor of everyone on the planet, and therefore every human possesses direct ancestors of her mitochondria (and her nuclear DNA). In contrast we receive a 50/50 split of nuclear DNA from father and mother.

I hope this helps!

7 0
3 years ago
Which of the following explanations is true based upon the graph?
DerKrebs [107]

Answer:

B.) II only

Explanation:

More land is needed for plants than combined beef to produce 100 grams of protein because plants produces very low amount of protein as compared to beef that produces large amount of protein. Beef is made up of protein so when we eat it, it provides large amount of protein while on the other hand, plant body is made up of other molecules and very little amount of proteins.

5 0
3 years ago
What would occur if sodium channels remained open once membrane depolarization was complete?
12345 [234]

Answer:

C.  Repolarization would occur, but much more slowly.

Explanation:

Repolarization is the change in membrane potential that returns it to a negative value just after the depolarization phase of an action potential has changed the membrane potential to a positive value. Sodium channels slow down this process.

6 0
3 years ago
Which of the following is not correct? All cells _____. convert energy perform maintenance photosynthesize interpret coded infor
ZanzabumX [31]
The correct answer that would complete the given statement above would be the third option. The option that is not correct is photosynthesize. Not all cells do photosynthesis. All living organisms consist of cells, but the only cells that are capable of photosynthesis are those that are found in plants. Cells in animals are not capable of photosynthesizing. 
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4 years ago
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