The pressure required to stop water from moving across the membrane by osmosis is called
A. transport pressure.
B. crenation pressure.
C. atmospheric pressure.
D. osmotic pressure.
E. mechanical pressure.
D. osmotic pressure.
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Which of the following is referred to as a hollow ball of cells?
a. cleavage b. egg c. gastrula d. zygote e. blastula
With regard to photosynthesis, photorespiration ____
a. is more efficient in producing carbohydrates b. predominates in C3 plants in cool weather when water is plentiful c. predominates in C4 plants on hot days d. produces the same amount of PGA e. is less efficient in producing carbohydrates
In the case study involving the phylogeny of whales, ________
A) molecular data and fossil data are in conflict with each other B) molecular data confirmed what was already known from the fossil record: whales are cetaceans C) fossil discoveries confirmed what molecular data already suggested: whales are cetaceans D) both molecular and fossil data are inconclusive
Over a span of several thousand years, a number of species show adaptations to climate change: Drier, warmer conditions select for succulent vegetation and deep taproots in plants, burrowing in mammals and amphibians, and other similar adaptive changes
What could be predicted to happen if the climate shifts in the opposite direction and becomes progressively wetter and cooler? A) Ongoing processes of adaptation will continue because evolution is goal directed. B) Different adaptive trends will probably be favored in the new climatic environment. C) Current adaptive trends will continue, but organisms will now also have to add on adaptations to deal with cool, wet conditions. D) Adaptation will cease because cool, wet conditions are suitable for all life on Earth.