Adult insects exchange respiratory gases primarily by means of:
a. spiracles only
b. tracheal tubes and spiracles
c. lungs
d. gills
e. body surface
b
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CAM plants keep stomata closed in the daytime, thus reducing loss of water. They can do this because they _____
A) fix CO2 into organic acids during the night B) fix CO2 into sugars in the bundle-sheath cells C) fix CO2 into pyruvate in the mesophyll cells D) use the enzyme phosphofructokinase, which outcompetes rubisco for CO2 E) use photosystem I and photosystem II at night
You would expect water derived from the synthesis of ATP to be especially important for
A. small desert dwelling animals. B. rain forest amphibians. C. arctic mammals. D. sea birds. E. marine mammals.
Birds store most of their waste nitrogen as uric acid. Indicate whether the statement is true or false
Children with Bruton-type agammaglobulinemia are highly susceptible to recurrent infections
Indicate whether the statement is true or false