They seem right to me, Good Work :)
Answer:
Channel protein.
Explanation:
Channel protein have gate that opens and close which allow the passage of polar substance or ions to move to permeable membrane of the cell by diffusion. They are water filled and allow the movementof charged molecules inside and outside the cell membrane i.e polar molecules move through non polar bilayer of the cell membrane.
Answer:
a. muscle contraction of sustained force resulting from repeated action potentials.
Explanation:
Tetanus is a symptom consisting of the constant contraction of one or more muscles. This can be caused by diseases or other physiological conditions that cause an increase in the frequency of action potentials that promote muscle contractions. Thus, the contractions overlap each other and consequently the muscle remains in a condition of constant contraction.
Answer:
Red algae are red because of the presence of the pigment phycoerythrin; this pigment reflects red light and absorbs blue light.
C<span>ompared to the desert fennec, you might expect the arctic fox to have shorter ears.
Given that the desert fennec fox lives in the desert, where it is quite dry and hot, and the arctic fox lives in a place where it is extremely cold, by analogy, if the first fox has long ears, the second one will have shorter ears. Because the locations they live in are quite different, their ears are going to be each other's opposites.
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