The process of fertilization joins male and female gametes ____
a. randomly
b. that contain a greater number of paternal chromosomes
c. that contain a greater number of maternal chromosomes
d. with the fewest mutations
e. with the best adaptive traits
ANSWER: a
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When root cells release the hormone abscisic acid (ABA), what is the result? a. Solutes exit guard cells, causing stomata to close
b. Epidermal cell secretions increase. c. Solutes enter guard cells, casing stomata to open. d. Root hairs grow in the direction of water and nutrient availability.
Which cells supply nutrients to and remove wastes from nerve cells?
a. dendrites b. glial c. myocytes d. neurons e. chondrocytes
Which description applies to individuals who are well adapted for a particular environment?
A) They may or may not be equally fit in another environment. B) They are the best fit for all other environments. C) They are at a disadvantage in other environments. D) They will mutate to become fit in other environments.
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Figure 33.17
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Use the accompanying figure to answer the following question.
The retina is indicated by the letter ____.
A. A B. B C. C D. D E. E