Bioluminescence of deep-sea animals may be used for all of the following except:
a. attraction of prey.
b. detection and identification of mates.
c. countershading.
d. photosynthesis.
e. startling a predator.
D
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During aerobic decomposition of organic matter the primary gas produced is
A. oxygen. B. hydrogen sulfide. C. nitrogen. D. carbon dioxide.
Which of the following is a symptom of Cushing's disease?
a. loss of ability to cope with stress b. mild infection c. abnormally large face and hands d. fat deposition around the trunk e. mental retardation
In bacterial cell division, the cell divides into two nearly equal halves. This process is referred to as
A. binary fission B. meiosis C. cytokinesis D. fusion E. mitosis
Angiosperms use which temporary reproductive structures that are not present in any other group of plants?
A. flowers B. seeds C. receptacles D. carpels E. cones