Water moves out of filtrate in the nephron tubule into the interstitial fluid by
A) filtration.
B) excretion.
C) secretion.
D) osmosis.
Answer: D
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Green and purple bacteria
A) contain chlorophyll a like plants. B) give off oxygen as a product of photosynthesis. C) live in salt water. D) include species that use sulfur in photosynthesis.
Plants have evolved non-reproductive traits such as fragrance and flower characteristics compatible with the attributes of their __________.
A. pollination vector B. calyx C. predator D. herbivore E. carpel
Punctuated equilibrium proposed by Eldredge and Gould in 1972 is an evolutionary process that involves
A. gradual change observable in the fossil record with very little, if any, stasis. B. gradual change observable in the fossil record followed by periods of no change at all. C. "spurts" of change observable in the fossil record with very little if any stasis. D. gradual change observable in the fossil record followed by periods of stasis. E. "spurts" of change observable in the fossil record followed by periods of stasis.
Sulfate reduction in MOST anoxic environments is limited by
a. oxygen concentrations. b. sulfate availability. c. hydrogen concentrations. d. light availability.