Which structure will form the outer layer of a bone?
a. Yellow marrow
b. Compact bone
c. None of these choices
d. Spongy bone
e. Red marrow
b
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Why is it thought that the majority of natural selection is stabilizing selection?
A. Most mutations are deleterious and produce an extreme phenotype that is selected against. B. Most mutations are beneficial and produce intermediate phenotypes. C. Mutations produce extreme phenotypes, which are selected for. D. Artificial selection is the most common, which is a type of stabilizing selection. E. Directional selection is more common because it increases adaptations to the environment.
A ____ is an example of a nonvascular plant.
A. liverwort B. rose C. red pine D. maiden hair fern
Which of the following is TRUE of the relationship between the phytochrome system and the biological clock of plants?
A) The phytochrome system serves as the biological clock for plants. B) The phytochrome system detects light and resets the biological clock. C) The biological clock detects light and sends the information to the phytochrome system. D) The phytochrome system manufactures special cells that control the biological clock. E) There is no relationship between the phytochrome system and the biological clock.
A treatment effect is:
A. the different treatments among treated and control groups. B. the variation in the treatment. C. an unbiased estimate. D. the change in the outcome resulting from variation in the treatment.