Which genetic factor confers upon bacteria the ability to undergo conjugation?
a. the F factor
b. the sex pilus
c. the X factor
d. the C factor
Ans: a. the F factor
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Social attachments are formed between parents and offspring.
Choose the letter of the best match: A. cognition B. waggle dance C. navigation D. filial imprinting E. fixed action pattern
A remora feeds on the scraps that escape from a shark's mouth while feeding. It has no clear positive or negative impact on the shark. This is an example of
A) competition. B) commensalism. C) amensalism. D) neutral.
The process that decreases the number of organisms with phenotypes less fit to meet environmental
challenges is: a. natural selection. b. genetic drift. c. gene flow. d. genetic polymorphism. e. migration.
The Greek root words meaning "together" and "fatherland" are the basis for the term
A. adaptive radiation. B. allopatric. C. sympatric. D. speciation. E. prezygotic.