Trace fossils include all of the following except:
A. the mineralized skull of an ancient
mammal.
B. the trail left by a crawling worm.
C. the impression of a bird feather.
D. a dinosaur footprint.
E. the burrow of an extinct crab.
A
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Once they have been processed through the citric acid cycle, the acetyl-CoA molecules from a single glucose molecule will produce:
A. 2 ATP, 6 NADH, 4 CO2. B. 6 NADH, 6 GTP. C. 6 FADH2, 2 ATP, 6 CO2. D. 6 GTP, 6 FADH2. E. 4 CO2, 6 FADH2, 2 ATP.
Which level of organization is required for all others to form?
A. cell B. tissue C. organ D. organism E. population
The first plant to colonize the plains of Mt St
Helens after this volcano erupted in 1980 was a prairie lupine. The prairie lupine is an example of
a. a secondary successor. b. a pioneer species. c. a keystone species. d. an exotic species. e. more than one of these.
Which of the following is a nonrenewable resource?
a. copper and gold b. fresh water c. forests d. grasslands e. fish