What can scientists study in the fossil record to learn about the distribution of grasses in the past? Select all correct choices
A. herbivore teeth
B. herbivore hooves
C. stromatolites
D. phytoliths
E. the ratio of different carbon isotopes in
fossils
A,D,E
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In Barrow, Alaska, the sun does not set for several months in the summer. Based on what you know about photoperiodism, what type of plant is most likely to flower during the summer in Barrow?
A. Long-day plants. B. Short-day plants. C. Day-neutral plants.
The condition occurring when an organism has a 2n
+ 1 chromosome composition is known as a. monosomy. b. deletion. c. diploid. d. aneuploidy. e. both deletion and aneuploidy.
The process illustrated in Figure 36-2 is known as:
a. humus formation. b. weathering. c. cation exchange. d. soil erosion. e. salinization.
Graves' disease is an example of which of the following type II hypersensitivity cytotoxic reactions?
A) Antibodies directly recruit leukocytes to lyse tagged extracellular cells B) IgM binds to nonsoluble antigens on the surface of a cell causing complement cascade activation to lyse cells. C) Antibodies interact with a cell-surface receptor on self-cells causing the inactivation of the receptor. D) IgG binds to nonsoluble antigens on the surface of a cell causing complement proteins to opsonize the target, thereby tagging it for phagocytosis. E) Antibodies interact with a cell-surface receptor on self-cells causing the overactivation of the receptor.