The similarities in function of hummingbird wings and the wings of a butterfly reflect
A) homology but not analogy.
B) homology through convergent evolution.
C) analogy and homology.
D) analogy but not homology.
Answer: D
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Which of the following statements about the causes of extinction are true? Check all that apply.
_____ Probability of extinction varies inversely with population size. _____ Ten 10-hectare habitat patches is not the same as one 100-hectare patch. _____ Habitat loss is currently the major cause of extinction. _____ The prehistoric megafauna of North America were spared from extinction because they coevolved with humans. _____ Probability of extinction is greatest for an endemic species.
The place that an organism resides is
(a) its community. (b) its habitat. (c) its population. (d) all of the above.
Visible light has a wavelength range of
A. 200-400 nanometers. B. 200-740 nanometers. C. 400-740 nanometers. D. 0.001-100,000 nanometers. E. 200-800 nanometers.
Which statement is NOT true about retroviruses?
A. cDNA is used as a template to transcribe double-stranded DNA. B. They contain an enzyme called reverse transcriptase. C. HIV is a retrovirus. D. They incorporate themselves into the host cell genome, but replicate independently of the host DNA.