Which of the following is NOT a major terrestrial biome of Earth?
A. the temperate grasslands
B. the tundra
C. the taiga
D. the Antarctic
E. the tropical rain forest
Answer: D. the Antarctic
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Paraquat is an herbicide that blocks the transfer of electrons from PSII. Mechanistically, paraquat is effective because it __________
A. prevents the reduction of NADPH B. prevents the formation of reactive oxygen species C. increases the formation of reactive oxygen species D. absorbs light energy that cannot then be used for photosynthesis E. increases cyclic electron transport, which does not produce NADPH
We are sending a small number of dogs to colonize a new planet. Through a random selection process,
we end up only with dachshunds and chihuahuas. The subsequent colony of dogs are all small with short legs. This is an example of
a. adaptive radiation. b. punctuated equilibrium. c. genetic drift. d. microevolution. e. mutation.
What information cannot be determined from the DNA sequence of a cDNA clone?
A) exon sequences B) sequence of the promoter C) similarity to previously identified sequences D) amino acid sequence of the encoded polypeptides E) sequence of the spliced mRNA transcript
What are homologous chromosomes?
A) chromosome that almost always contain identical alleles B) chromosomes that generally contain the same genes C) chromosomes that are inherited together because they don't separate during meiosis D) chromosomes that are fewer in body cells than in gametes