Compare and contrast conventional and costly signals. Which statement is incorrect?
a. Both signals elicit costs during either production (honest signal) or use (dishonest signal).
b. Both signals are energetically costly to produce.
c. The meaning of conventional signals is not intrinsically connected with the structure.
d. Not communicating at all may provide more fitness than communicating with a costly signal.
B
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Which of these structures is derived from an ancestral air-breathing lung in ray-finned fishes and is
used to increase buoyancy?
a. swim bladder b. spiral valve c. operculum d. atrium e. lateral-line system
Microtubules are
a. affected by cancer-fighting chemicals such as Taxol. b. responsible for formation of the contractile ring. c. involved in cell plate formation. d. only built up to make longer and longer microtubules. e. important during interphase of the cell cycle.
The more heritable traits organisms share, the more taxonomic levels they share.
a. true b. false
A physiologist is a biologist who studies the ________
A) structure of living things B) structure of body parts C) evolution of animals D) function of body parts