Sleep is an example.
Circadian rythms are biological processes that repeats itself within a certain time frame, as sleep repeats itself approximately once every day.
i think it is D, she has already constructed the hypothesis and needs is performing the experiment. there is not much of an observation stage because she is looking at a distant end result in a set time frame.
Answer:
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<em><u>When the tide goes out, the barnacle closes shop to conserve moisture. As the tide comes in, a muscle opens up these four plates, and the feathery legs of the barnacle sift the water for food.</u></em></h2>
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Answer:
single stranded binding protein
The separation or division of the parent cell is called cytokinesis
