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
Biology & Microbiology
The ____ gives rise to muscles, bones, and the circulatory system
a. endoderm b. ectoderm c. mesoderm d. blastopore e. mesoglea
Biology & Microbiology
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