Bipedal behavior and a skeleton adapted for
bipedalism were not weeded out by natural
selection because they
a. improved stability during locomotion.
b. enabled the forelimbs to efficiently
manipulate the environment.
c. accelerated the development of binocular
vision.
d. improved stability during locomotion and
enabled the forelimbs to efficiently
manipulate the environment.
e. improved stability during locomotion,
enabled the forelimbs to efficiently
manipulate the environment, and
accelerated the development of binocular
vision.
B
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Organisms that are characterized by being unicellular, photosynthetic, and having double shells made of silica are known as
A. dinoflagellates. B. diatoms. C. kelps. D. euglenoids. E. foraminifera.
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What will be an ideal response?
Plasma cells come from
a. T cells. b. dendritic cells. c. B cells. d. macrophages. e. monocytes.
After fertilization, which hormone is secreted by the developing embryo to maintain the function of
the corpus luteum? a. GnRH b. FSH c. hCG d. ACTH e. LH