The conversion of nitrate (NO3-) to nitrogen gas (N2) is called
A. photosynthesis.
B. denitrification.
C. nitrification.
D. ammonification.
E. nitrogen fixation.
Answer: B
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Mendel's experiments with garden peas differed from those of other plant hybridizers of the time in that:
A. Mendel studied true-breeding strains, rather than poorly defined material. B. Mendel focused on a small number of easily contrasted traits, rather than a large number of more complex traits. C. Mendel quantified his results and looked for statistical patterns, rather than simply noting the presence or absence of a trait among a group of offspring. D. Mendel performed no crosses between strains, whereas other hybridizers did. E. Mendel studied true-breeding strains, focused on a small number of easily contrasted traits, and quantified results.
Which of the following is a eutherian mammal?
a. human being b. koala bear c. platypus d. Tasmanian devil
Polygyny is often positively correlated with:
a) territoriality and mate guarding. b) equal parental investment and equal choosiness in mate selection. c) sexual monomorphism and variation in male reproductive success. d) sexual dimorphism and variation in male reproductive success. e) sexual dimorphism and variation in female reproductive success.
mitochondria and chloroplasts may have arisen through
What will be an ideal response?