Birds are different from all other living vertebrates because they
A. can fly.
B. lack teeth.
C. have feathers.
D. are bipedal.
C. have feathers.
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Bioluminescent microorganisms are found in which of the following groups?
A) Firmicutes B) Thaumarchaeota C) Gammaproteobacteria D) Verrucomicrobia
The _______ definition of species says that a species is a group of organisms that are reproductively isolated from other such groups.
Fill in the blank(s) with the appropriate word(s).
The idea that older, more stable habitats have greater species richness than habitats subjected to
frequent, widespread disturbances is known as: a. natural selection. b. the time hypothesis. c. island biogeography. d. the theory of community stability. e. the disturbance hypothesis.
In a well-designed experiment, the
a) prediction will be be highly probable if the explanation is correct b) prediction will be highly improbable if the explanation is incorrect c) prediction will most likely be true d) null hypothesis will not be tested e) both the first and second answer choices are correct