Answer:
Malthus.
Explanation:
<em>Malthus formulated what is today known as the Malthusian catastrophe during which he explained that limited resources put a check on the population of humans. He further explained that limited resources will provoke competition.</em>
<em>Darwin later adopted the idea of competition to develop the theory of survival of the fittest, also known as natural selection.</em>
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Answer:
<u>ion channels</u>
Explanation:
The plasma membrane plays a critical role in regulating and maintaining ionic potential inside the cell, relative to ionic concentration present outside the cell. The ion channels are specific, in that they only recognize and allow particular ions to pass through and block the rest. Their opening and closing depends on the ionic potential during that time period.
Answer:
D
Explanation:
Positive feedback loops are rarer than negative ones because of homeostasis, but they do occur. Negative feedback loops return to the set point in reverse, and positive feedback loops amplify a departure from the set point.
