Planktonic foraminifera often have smaller photosynthetic protists such as diatoms or algae ____
a. living inside them
b. living on their shell
c. living near them on the ocean floor
d. aiding in the building of their shell
e. providing carbon dioxide for them
a
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Which of the following is true about the production of polar bodies in humans?
(A) It increases genetic variability. (B) It provides the maximum amount of cytoplasm and resources to the ovum. (C) It occurs in male and female vertebrates during meiosis I. (D) It is completed prior to fertilization. (E) It results in nondisjunction.
When evolution leads to behaviors that are good for a species or population but detrimental to the individual exhibiting the behavior, this process is called:
a. reciprocal altruism. b. kin selection. c. group selection. d. selfish selection. e None of the above.
Which of the following is NOT a trait of all chordates (at some point during their lives)?
a) notochord b) muscular, post-anal tail c) dorsal nerve cord d) series of pharyngeal slits e) radial symmetry
In precipitation tests, maximum precipitation takes place when
A) the amount of the antibody exceeds the amount of the antigen. B) the amount of the antigen exceeds the amount of the antibody. C) the amount of the antibody and the amount of the antigen are at optimal proportions. D) a toxin is present. E) a complex solution of many antibodies is used.