A danger of nitrogen saturation is
A) increased productivity.
B) basic soils.
C) acidic soils.
D) lack of carbon.
C
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Along with the egg, in the part of an embryo sac next to the micropyle you should find
a. the central cell. b. a seed. c. the pollen tube. d. synergids. e. antipodal cells.
Steroids are among the lipids with no _____
a. double bonds c. hydrogens b. fatty acid tails d. carbons
Why is photorespiration more of a problem for a plant when their stomata are closed?
A. Oxygen, from water in photosystem I, cannot leave the leaf, and competes with carbon dioxide for rubisco's active site. B. Oxygen, from photosystem I, cannot leave the leaf and causes hypertension to occur in the leaves. C. Carbon dioxide levels increase from the light reactions, and compete with oxygen for rubisco's active site. D. Oxygen cannot enter the leaf, blocking normal respiration, so the plants switch to photorespiration. E. Water is lost when the stomata are open, and is not available to accept electrons from photosystem I.
What are the monomer "building blocks" that make up proteins?
A) monosaccharides B) glycerol molecules C) amino acids D) fatty acids