Viruses that become established as stable parts of the host cell genome are called
A. lethal.
B. potent.
C. temperate.
D. virulent.
C. temperate.
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Support for the succession mechanism of tolerance is found in research on plant communities that shows
A. the island biogeographic theory is generally supported. B. turnover is not what would be predicted by other theories. C. climax communities never form as predicted by Clements. D. succession is determined largely by species that exist in the ground as seeds or old roots. E. None of these choices are correct.
Many sponges are hermaphroditic, which means that
a. both males and females are filter feeders. b. both males and females produce sperm. c. a single individual produces both sperm and eggs. d. only males have flagellae. e. both males and females produce gemmules.
Asexual reproduction essentially involves creating copies of oneself, whereas sexual reproduction involves combining genetic material with another individual to create offspring. Some species are capable of using both asexual and sexual reproduction: under what circumstances would you expect sexual reproduction to be used?
a) stable environments b) foreign environments c) unpredictable environments d) warm environments
Organisms that grow near deep-sea volcanic vents are likely to be ________.
A. alkylophilic B. barophilic or barotolerant C. picrophilic D. acidophilic