Answer:
D. Control the blood flow into the capillary bed
Explanation:
The degree of filling of the capillary bed and level of arterial pressure within the vascular system is determined mainly by the degree of tonus (firmness) in the smooth muscle of the arterial wall. Arterioles have relatively narrow lumina, thick muscular wall and precapillary sphincter.
The property of water which would be most important in protecting a fish in a shallow pond on a hot summer day are C. <u>water's strong forces of cohesion.
</u>A is incorrect because water is not solid during summer. D is also incorrect because solvency refers to it being able to dissolve. Adhesion has to do with water being attracted to other substances, so B is also incorrect.<u>
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Answer:
Root hairs are where most water absorption happens. ... The function of root hairs is to collect water and mineral nutrients that are present in the soil and take this solution up through the roots to the rest of the plant. As root hair cells do not carry out photosynthesis they do not contain chloroplasts.
Explanation:
The concentration of the cell and that of its environment