Most dinosaurs died out at the end of the

a. Triassic.
b. Jurassic.
c. Cretaceous.
d. Tertiary.
e. Permian.


C

Biology & Microbiology

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E are _______ major families of RNA containing viruses that infect vertebrates

A. 2 B. 5 C. 7 D. 13

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The ____ gives rise to muscles, bones, and the circulatory system

a. endoderm b. ectoderm c. mesoderm d. blastopore e. mesoglea

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In the Hardy-Weinberg formula, what does 2pq represent?

A) frequency of the dominant allele B) frequency of heterozygotes C) frequency of the recessive allele D) frequency of the homozygous dominants

Biology & Microbiology

Both extremes of an array of phenotypes are favored in ________.

A. disruptive selection B. genetic drift C. directional selection D. stabilizing selection E. gene flow

Biology & Microbiology