The gastrovascular cavity of a flatworm serves as both the ____ and ____ systems of the body
a. digestive; circulatory
b. digestive; reproductive
c. digestive; respiratory
d. circulatory; respiratory
e. respiratory; reproductive
ANSWER: a
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Refer to Figure 31-1. Which of the following structures are feeding polyps?
A. 1. B. 4. C. 6. D. 7. E. 9.
Both ATP and NADPH are required for
A. neither the light reaction nor the Calvin cycle. B. the light reaction only. C. electron transport through the thylakoid membrane. D. both the light reaction and Calvin cycle. E. the Calvin cycle only.
Protozoan motility structures include
A) cilia. B) flagella. C) pseudopods. D) cilia and pseudopods only. E) cilia, flagella, and pseudopods.