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Romashka [77]
3 years ago
13

Which movement of substances through a cell membrane against a concentration gradient requires energy?

Biology
1 answer:
raketka [301]3 years ago
6 0
The answer to this is active transport. 

This is a kind of movement of substances. Unlike diffusion or osmosis, the substances move against the concentration gradient (ie. from low concentration to high concentration). This process requires extra energy generated such as from cellular respiration. 

In addition, this process also requires a carrier protein, where it'll pick up certain substances that are needed to transport and move it to the other side. Some examples of movements of active transports are such as root hair cells of plants picking up minerals, or our small intestine absorbing nutrients digested.
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4. Adaptation: The organisms with survival traits tend to survive more and pass their traits to the future generation.

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5. Evolution: The change in allele frequency of the population takes place.

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2. Natural habitat is in trees. Green leaves hide green beetles.  

3. The brown beetles are noticed by birds in the area.

4. Birds eat brown beetles.

5. Green beetles reproduce in greater number than brown beetles.

6. More green beetles survive than brown beetles.

7. Beetle population changes from brown and green to mostly green beetles

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<span>It allows the plant to conserve nutrients until conditions improve 

</span>
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Read 2 more answers
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