In the life cycle of a flowering plant, a single megaspore undergoes cytokinesis producing a female gametophyte that
consists of ____ cells.
a. two
b. three
c. four
d. seven
e. eight
ANSWER: d
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The apples from the apple trees Johnny Appleseed sold to homesteaders were mainly used to make ____
a. pies b. apple juice c. hard cider d. jam e. sauce
In the near future, the human population is predicted to involve
A. a worldwide decrease in population growth due to limited resources. B. a continuation of human population growth at the same pace as in the previous century. C. a decrease in growth in most, but not all, more-developed countries and continued growth in most less-developed countries. D. an increase in population growth in all countries in the world.
Figure 8.12 In the accompanying figure, the green rectangular shape represents__________.
A. DNA transferase B. DNA helicase C. RNA polymerase D. DNA polymerase E. DNA hybridization
In order for allopatric speciation to occur, first there must be a geographic separation of two populations of the same species. The second step requires:
A) an increase in gene flow between the populations. B) additional extrinsic isolating mechanisms to become involved. C) physical and behavioral changes that keep them from interbreeding. D) physical and behavioral changes that permit occasional hybridization.