Which of the following is the best definition for recombinant DNA?
A) DNA that results from bacterial conjugation
B) DNA that includes pieces from two different sources
C) an alternate form of DNA that is the product of a mutation
D) DNA that carries a translocation
B
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Interferons, complement, lysozyme, and lactoferrin are all examples of
A. specific antimicrobial factors. B. immune enzymes. C. nonspecific antimicrobial factors. D. cytokines.
Cells of a ____ organism live together, but remain self-sufficient
a. single-cell b. multicellular c. colonial d. eukaryotic e. protist
The letter "B" from above represents which of
the following? a. nucleus of the flame cell b. small capillaries which allow water to freely diffuse into the planarian c. sexual reproductive organ of the planarian d. cilia which flick to draw fluid into the planarian e. none of these
The process through which species not closely related may come to resemble one another if they live in a similar environment is known as
A) coevolution. B) homology. C) convergent evolution. D) paedomorphosis.