Under which of the following taxonomic levels do animals fall?
a. species
b. order
c. class
d. kingdom
d. kingdom
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An X-linked carrier is a
a. homozygous dominant female. b. heterozygous female. c. homozygous recessive female. d. homozygous male. e. heterozygous male
Colonial cnidarians
a. include Obelia. b. include the Portuguese man-of-war. c. include corals. d. may harbor dinoflagellate symbionts. e. fit all of these descriptions.
Which of the following is the most important force in shaping evolution?
A) the fixity of species B) random events C) biological research D) natural selection
The phylogenetic species concept (PSC) declares that a group is a species if it
A. looks different than other species. B. is allopatric. C. is reproductively isolated from other species. D. has no synapomorphies. E. has evolved one or more of its own derived characters.