Changing day length, as well as variations in precipitation and temperature, are environmental cues
that exert an important influence on:
a. the kinds of genes a plant has.
b. the number of mutations that genes undergo.
c. whether a plant is an annual, biennial, or perennial.
d. which genes will be expressed in a plant.
e. whether a plant reproduces sexually or asexually.
D
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When Mendel crossed two plants that were heterozygous for a single trait, what was the phenotypic ratio of their offspring?
A. 1:2:1 B. 9:3:3:1 C. 3:1 D. 7:4 E. Varied depending on the trait
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.
What does phylogenetic evidence tell us about protostomes?
A. There was one transition from land to water. B. There were multiple transitions from land to water. C. There was one transition from water to land. D. There were multiple transitions from water to land.
Who, along with Alfred Wallace, formulated the theory of natural selection?
A) Louis Pasteur B) Gregor Mendel C) James Watson D) William Harvey E) Charles Darwin