Fertilization occurs within which of the structures in Figure 50-3?
a. 1
b. 2
c. 4
d. 7
e. 8
A
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Consider the structure of a trophic pyramid when answering the following questions: Why are shrimp more abundant than whales in the ocean?
A. Whales reproduce more slowly, so maintain small population sizes. B. More energy is available to primary consumers, and thus the biomass/abundance of primary consumers is greater than that of secondary consumers. C. Whales are warm-blooded secondary consumers and lose more energy as heat, therefore their level on a trophic pyramid is smaller (more narrow) than for shrimp (primary consumers). D. The levels of the trophic pyramid represent the percentage of primary producers that make up a consumer's diet. Whales eat less of the primary producers, so their level on a trophic pyramid is smaller than the level for shrimp.
Some studies suggest that, as global warming progresses, tropical lowland trees may be limited in their
ability to move northward because of ____.
a. predicted desertification of temperate areas b. temperatures in the north still being too low c. flooding of coastal areas d. extreme weather events like hurricanes and blizzards e. development and habitat loss
Which of the following statements about the lagging strand is false?
A) It builds in the opposite direction of the helix unwinding. B) It is where one would find Okazaki fragments. C) It synthesizes many RNA primers. D) It uses only one molecule of DNA polymerase I. E) It is a discontinuous process.
A muscle fiber is made up of many
A. bursa. B. muscle cells. C. T tubules. D. fascicles. E. myofibrils.