What percentage of oxygen in the air is typically extracted by the mammalian lung?
A. less than 25%
B. 26–50%
C. 51–75%
D. 76–90%
E. 91–100%
A
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Edge effects are the result of which of the following?
A. Populations of flora and fauna have emigrated from the core of their population center to the edge of their habitat. B. Metapopulations of some of the larger fauna have become more dominant on the landscape and as a result have increased the edge of their habitat. C. Habitat fragmentation or habitat shrinkage has occurred, and thus the edge of the habitat has increased in relative proportion. D. Habitat fragmentation or habitat shrinkage has occurred, and thus the edge of the habitat has decreased in relative proportion. E. Populations of particular species have decreased and are on the edge of extinction.
Electrons move between PSII and PSI via __________
A. cytochrome b6f B. water C. chlorophyll D. NADP+ E. NADPH
Which of the following involve symbiotic relationships?
A. rhizobia B. mycorrhizae C. ruminants D. myxobacteria E. rhizobia, mycorrhizae AND ruminants
If the kidneys fail, the ________ will excrete more uric acid.
Fill in the blank(s) with the appropriate word(s).