What are the members of a pair of chromosomes (for example, the two copies of chromosome 1 ) called?
A) alleles
B) gametes
C) homologous chromosomes
D) sister chromatids
C
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Stiling and Drake conducted experiments about the effects of elevated atmospheric carbon dioxide on insect herbivory. What did they find?
A. Elevated plant growth, but no change in insect herbivory. B. No change in plant growth, but elevated insect herbivory. C. Elevated plant growth, but reduced insect herbivory. D. Elevated plant growth and insect herbivory. E. No change in plant growth, but increased insect herbivory.
A temporary oxygen deficit during strenuous exercise causes a muscle to
A) synthesize muscle proteins in response to steroid hormone stimulation. B) synthesize glycogen. C) ferment pyruvate to lactate. D) switch to aerobic glycolysis. E) synthesize more NAD+.
Which of the following statements about the role of fire in biomes / ecosystems is true?
A) Forest fires did not occur in the times before human settlement. B) Fires decrease the number of animal communities in ecosystems by destroying habitat. C) Forest fires are extremely destructive to ecosystems and should be put out as quickly as possible. D) Fire is essential to maintaining some ecosystems. E) Fire is not an important factor in developing and maintaining ecosystems.
It is beneficial to study microbial communities in situ because ________.
A. microbes can be studied even if they are nonculturable B. gene expression may be different in an environmental sample versus an anexic culture C. in situ studies maintain the relative concentrations of different microorganisms in a sample D. All of these are reasons to study microbial communities in situ.