In which phylum does a sea anemone belong?
a. Cnidarians
b. Porifera
c. Plathelminthes
d. Mollusca
Ans: a. Cnidarians
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Which cell is NOT the same type as the others?
a. erythrocytes b. neutrophils c. lymphocytes d. eosinophils e. monocytes
The current concept of a climax community states that forest communities:
a. never reach a state of permanent equilibrium. b. never are disturbed. c. are determined solely by climate. d. are not permanently affected by fires or floods. e. are the inevitable end-point of succession.
There are not many species of fish living deep in the oceans, but the deep-sea fish occasionally pulled up by fisherman have been bizarre creatures, such as the deep-sea anglerfish with its giant fangs and bioluminescent lure. Why have these fascinating deep-sea fish never been shown live on exhibit in an aquarium?
A. They might frighten visitors. B. They are adapted to cold temperatures and total darkness. C. Their diet is too specialized. D. They are adapted for high pressure, and will die at low pressure.
Which of the following evolutionary innovations played key roles in allowing life on land?
a. conjugation b. amniotic egg c. exoskeleton d. B and C e. all of the above