After the theory of natural selection was proposed, how many years did it take for the work in genetics to provide
supporting insights?
a. 20
b. 50
c. 70
d. 90
e. 100
ANSWER: c
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What is ALH 84001 and why is it significant to discussions of the evolution of life?
What will be an ideal response?
The main difference between germ-line gene therapy and somatic gene therapy is
a. only somatic gene therapy can result in the modified genes being passed to the next generation. b. only germ-line gene therapy will have results limited to the current generation. c. in germ-line gene therapy, the gametes are altered; in somatic gene therapy, that doesn't happen. d. in somatic gene therapy, the gametes are altered; in germ-line gene therapy, only the body cells are altered. e. only germ-line gene therapy is ethical for research purposes in rodents.
The HeLa cell line was isolated from a _____
a. chimpanzee b. rat c. human d. guinea pig e. dog
Until recently, protists have been classified according to observable traits such as modes of nutrition and mechanisms of movement. What is the basis for modern protist classification?
a. their evolutionary relatedness b. their similarity to plants c. their cell wall types d. their types of life cycles