The contribution an individual makes to the gene pool of the next generation compared to the contributions of other
individuals is called ____.
a. competition
b. genetic drift
c. relative fitness
d. gene flow
e. mutation
ANSWER: c
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Components typical of plant cells but not of animal cells are
(a) nuclei. (b) cell walls. (c) mitochondria. (d) ribosomes.
Instantaneous speciation (select all correct choices)
A. is, by definition, a type of sympatric speciation. B. is typically caused when hybridization between species produces fertile, viable offspring that are reproductively isolated from both parental species. C. often involves the multiplication of chromosome sets, or polyploidy. D. is relatively common in plants but not in animals. E. none of these
In a Punnett square, the letters on top of the square and on the side of the square represent ____
a. offspring genotypes b. zygote genotypes c. parental gametes d. offspring phenotypes e. parental phenotypes
The nervous system forms from the
A) chorion. B) yolk. C) endoderm. D) ectoderm. E) mesoderm.