Organisms that obtain heat primarily from internal physiological sources are called
a. endotherms.
b. isotherms.
c. exotherms.
d. ectotherms.
e. allotherms.
A
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Comb-jellies, or ctenophores, are similar to cnidarians in that they (select all that apply):
A. are radially symmetrical. B. have two tissue layers surrounding a gelatinous interior. C. differentiate muscle cells and a simple nerve net. D. digest prey within their gastric cavity. E. none of these
If a patient sample contains 8 copies of viral DNA, predict how many DNA copies would be present following three rounds of PCR amplification
a. 16 b. 24 c. 32 d. 64
In Arabidopsis plants, about 10% of its genome is devoted to processes tied to which molecule?
A. Gibberellins B. Phytochrome C. Ubiquitin D. Rubisco E. Auxin
In a population that is in Hardy-Weinberg
equilibrium, the frequency of the recessive homozygous genotype is 0.49. The percentage of the population that is heterozygous is a. 51. b. 49. c. 42. d. 7. e. 3.