As environments change, poorly adapted organisms will not survive and reproduce; therefore, we can expect species
to disappear at some low rate, called the ____.
a. background extinction rate
b. punctuated equilibrium
c. rate of phyletic gradualism
d. rate of adaptive radiation
e. mass extinction rate
ANSWER: a
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If purple flower color is dominant in pea plants, a cross between P generation purple and white plants
will result in
a. all purple flowers in the F1 generation. b. all white flowers in the F1 generation. c. all purple flowers in the F1 generation but a lighter purple than in the parents. d. mostly purple flowers in the P1 generation, with an occasional white flower. e. half of the plants having purple flowers, the other half having white flowers.
Which term describes the dark area of skin surrounding the nipple on the breast?
A. fimbriae B. follicle C. areola D. oviduct
Bats, pterosaurs, and birds are examples of ________ evolution.
Fill in the blank(s) with the appropriate word(s).
Draw a graph that illustrates the relationship between foraging ability and group size if group living is benefi-cial. On the same graph, draw a line of the relationship if group living is not beneficial
What will be an ideal response?