Which pair of traits is homologous?
a. butterfly wings and bat wings
b. the surfaces of bird and bat wings
c. the skeletons of bird and bat wings
d. butterfly wings and bird wings
e. bird wings and bat wings
ANSWER: c
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Certain toxins cause muscle paralysis. If the diaphragm is paralyzed, the most immediate
consequence is that _______________.
a. all gas exchange will stop b. ventilation will not occur c. all diffusion will stop d. gas exchange will occur across the body
Genomic analyses of the apple- and hawthorn-feeding races of Rhagoletis suggest that genetic divergence between the
two species has largely been driven by ____ selection, a diversifying form of natural selection.
a. disruptive b. directional c. stabilizing
d. artificial e. sexual
Which of the following Excavata members have hydrogenosomes?
A. Euglenozoa B. Fornicata C. Trichomonadida D. Trichonymphida
Which of the following toxins produced by Bordetella pertussis results in the accumulation of excess mucus in the trachea?
A. pertussis toxin B. adenylate cyclase toxin C. tracheal cytotoxin D. both adenylate cyclase toxin and tracheal cytotoxin E. both pertussis toxin and adenylate cyclase toxin