If you expose a plant to a light that shines on the right side of a plant, which of the following best
describes why the plant grows toward the light?
a. Light destroys auxin, and thus the shaded side grows faster.
b. Auxin moves from the shaded side to the lighted side where it stimulates growth.
c. Auxin moves from the lighted side to the shaded side where it stimulates growth.
d. Light destroys auxin and thus the lighted side grows faster.
e. Auxin moves from the shaded side to the lighted side where it inhibits growth.
C
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Water moves into a cell when the solution surrounding the cell is
A.) hypertonic B.) hypotonic C.) isotonic D.) concentrated
In the presence of carbon dioxide
A. hemoglobin dissociates. B. hemoglobin is not able to bind with bicarbonate. C. hemoglobin changes shape, causing it to give up oxygen more readily. D. the formation of bicarbonate causes oxygen to bind more tightly to hemoglobin.
Why are epithelial membranes not very thick?
A. Epithelial tissues can only reach a certain thickness because their growth is constrained by microtubules inside the cell membrane. B. Thick epithelial tissues would collapse due to the drying effect of the environment. C. Epithelial tissues are required to support other cells growing on top of the tissue. D. Epithelial tissues are programmed to stop dividing after only a few cell cycles. E. Epithelial tissues play a critical role in transport, and must be thin to allow diffusion to occur.
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What will be an ideal response?