Which of the following is a primary consumer?
a. cow
b. dog
c. hawk
d. fox
e. snake
Answer: a
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What would happen if an enzyme inhibitor for the enzyme photodiesterase (PDE) was applied to a vertebrate eye?
A) The opsins found in cones would not be differentiated into the red, blue, and green proteins, causing the animals to be color blind. B) The cGMP-gated sodium channels would remain open, glutamate would be continuously discharged at the synapses, and the brain would not detect light absorbed by the rod cells. C) The lens could not be appropriately adjusted to focus light on the retina, resulting in either nearsightedness or farsightedness. D) All of the listed responses are correct.
In the life cycle of a fungus, the binucleate mycelium becomes
a. compatible hyphae. b. a fruiting body. c. a new mycelium. d. many spores
Adulthood and mating of helminths occur in which host?
A. Primary host B. Transport host C. Definitive host D. Secondary host E. Mating occurs in all hosts.
Which molecules produced by the light-dependent reactions are required by the light-independent reactions?
a. O2 and H2O b. CO2 and H2O c. ADP and NADP+ d. NADPH and ATP