In T7, the proteins that inhibit the host restriction system are synthesized
A) before the entire T7 genome enters the cell.
B) while the T7 genome is entering the cell but before it enters the nucleus.
C) after the T7 genome is completely within the host cytoplasm.
D) in response to the T7 genome binding to the host chromosome.
Answer: A
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If primary production increases in an ecosystem, it would be reasonable to expect that
A. nutrients would no longer be limiting factors. B. net production would not increase. C. cellular respiration would decrease. D. the trophic web would become more complex. E. the biomass of herbivores would increase.
Bird respiration is extremely efficient because birds possess
a. a very long trachea. b. lungs. c. nares. d. air sacs. e. air bladders.
If an individual for whatever reason cannot
pass on its genes to offspring, the best alternative is to show altruism to a. relatives. b. strangers. c. neighbors. d. other species. e. competitors.
Four of the five answers listed below are conditions caused by chromosomal nondisjunction. Select the
exception. a. Down syndrome b. Huntington's disorder c. Turner syndrome d. Klinefelter syndrome e. trisomy 21