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Ivenika [448]
2 years ago
9

How would you describe the structure of the cell?

Biology
1 answer:
Vinil7 [7]2 years ago
3 0

Answer:

A cell is a mass of cytoplasm that is bound externally by a cell membrane. Usually microscopic in size, cells are the smallest structural units of living matter and compose all living things. Now put that into your own words.

Explanation:

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What do the chromosome pairs do in<br> meiosis?
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it creates new combinations of genetic material in the 4 daughter cells

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The earliest organisms were completely heterotrophic in nature. Why?
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The correct answer to this question is this one: they lacked oxygen. The earliest organisms were completely heterotrophic in nature because of the reason that they lacked oxygen. <span>A heterotroph is an organism that cannot fix carbon and uses organic carbon for growth. </span>
5 0
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Which molecule prevents a muscle contraction from occurring when the muscle is at rest?
AysviL [449]

Troponin-tropomyosin molecules prevents a muscle contraction from occurring when the muscle is at rest.

<h3>What is muscle contraction?</h3>

The activation of tension-producing regions within muscle cells results in muscular contraction. Because muscle tension can be created without changes in muscle length, such as when holding something heavy in the same position, muscle contraction does not always imply muscle shortening in physiology. Muscle relaxation, or the return of the muscular fibers to their low tension-generating state, occurs after a muscle contraction has finished.

Both length and tension can be used to characterize muscle contractions. If the muscle tension varies but the muscle length doesn't, the muscle contraction is said to be isometric. A muscle contraction is isotonic, however, if the tension in the muscle remains constant during the contraction.

To learn more about muscle contraction with the help of given link:

brainly.com/question/10115123

#SPJ4

5 0
1 year ago
What did the experiments of Griffith and Avery show about genetic information ?
juin [17]

Answer:

Griffith and Avery studied bacteria and mice. Their S and R experiment revealed that DNA stores and transmits genetic information from one generation of bacteria to another. Chromosomes consist of protein and DNA, but mainly DNA.

Explanation:

8 0
3 years ago
What type of behavior is a caterpillar building a cocoon?
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A. instinct.<span>Instinct is the tendency of an animal to exhibit a particular complex behavior.</span>
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