Which of the following is the largest conceptual unit?
A. ecosystem
B. community
C. food chain
D. population
A. ecosystem
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Which one of the following terms applies to the phylum Cnidaria?
A. radial symmetry B. pseudocoelomate C. Parazoa D. triploblastic E. protostome
Both rods and cones have four segments, each of which has a specialized function
Indicate whether the statement is true or false.
A typhoon devastates a population on "island A" and only a few individuals survive. Several generations later, the replenished population suffers from several inherited disorders that are very rare in other groups. A genetic event that explains this is
A) a population bottleneck. B) genetic load. C) a founder effect. D) natural selection.
Which of the following do NOT contain endoplasmic reticulum?
A. noneukaryotes B. animal cells C. eukaryotic cells D. All of the choices are correct.