Systematics is the study of
A. describing and classifying organisms, and their evolutionary relationships.
B. reproductive isolation.
C. naming and classifying organisms.
D. the biogeographic and distributions of species that have diverged.
E. similarities and evolutionary relationships among species.
A. describing and classifying organisms, and their evolutionary relationships.
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During which process are two diploid cells produced?
a. meiosis I b. meiosis II c. mitosis d. interphase
A houseplant placed in a window grows toward the
source of light because auxin a. becomes more concentrated on the illuminated side of the plant. b. becomes more concentrated in the roots of the plant. c. becomes more concentrated on the nonilluminated side of the plant. d. inhibits the growth of cells on the shady side, so the cells on the sunny side grow faster. e. does none of these.
Sex chromosomes do all of the following EXCEPT ____
a. determine gender b. vary from one sex to another c. carry some genes that have nothing to do with sex d. appear in a diploid cell as either XX or XY e. appear in a haploid cell as either XX or XY
____ convert nitrogen gas to nitrogen that plants can use.
A. Decomposers B. Nitrogen-fixing bacteria C. Nitrifying bacteria D. Denitrifying bacteria