Mutations that inhibit Rb gene expression will have what effect on cell proliferation?
A) Cells will proliferate less, even if excess growth factors are present.
B) Cells will proliferate less because growth factors are absent.
C) Cells will proliferate more because growth factors are produced in excess.
D) Cells will proliferate more, regardless of growth factor concentration.
E) There will be no effect on cell proliferation; only apoptosis occurs.
D
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A gene locus is
a. a recessive gene. b. an unmatched allele. c. a sex chromosome. d. the location of an allele on a chromosome. e. a dominant gene.
A slow-growing population is indicated by
a. A. b. B. c. C. d. D. e. none of these.
Which will exhibit the most shared maternal effects (uterine environment, etc.), identical or fraternal twins?
What will be an ideal response?
Which plant has a jointed hollow stem with reduced megaphylls?
a. moss b. horsetail c. club moss d. whisk fern e. hornwort