Which of the following are "usable" forms of nitrogen (N) and sulfur (S) that plants and animals can use to build proteins?
A. both N2 and NO3
B. both S2 and S3
C. both SO4 and NO3
D. both NH3 and S2
E. both N2 and S2
C
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Mycorrhizal fungi interact with plants at the
A. cuticle. B. edge of ponds. C. stomata. D. seed coat. E. roots.
PTH is necessary to produce calcitriol (activated vitamin D), which is necessary for the movement of calcium through cells. In this case, how would you characterize PTH?
A) submissive B) permissive C) synergistic D) antagonistic
Assume you were studying two characteristics of peas, and when you crossed heterozygous F1 individuals you did not see the 9:3:3:1 ratio predicted for a dihybrid cross. You later found that these two characteristics were on the same chromosome. With this information, how would you explain the results?
A. The results can be explained as polygenic inheritance. B. The pea plants must have acquired a new chromosome. C. The genes are linked and are inherited together. D. The genes must be on the sex chromosomes. E. There must have been a mutation.
According to researchers Parmesan and Yohe, how are living systems responding to anthropogenic
global warming?
a. All biomes are remaining intact and all are shifting their distributions northward. b. Some species are moving northward and others are not, so communities are being disrupted. c. All biomes are remaining intact, but some biomes are shifting their distributions and other biomes are not. d. Most plants are shifting their distributions northward, but most animals are not. e. Most animals are shifting their distributions northward, but most plants are not.