A transgenic crop is created by _____
a. artificial selection
b. selective breeding
c. transfer of a genetic trait from a different species into the plant's cells
d. culturing adult stem cells
e. cutting DNA with restriction enzymes and separating the DNA fragments by size
c
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Describe at least 3 adaptations of modern whales adapted for a completely aquatic existence
What will be an ideal response?
This animal has two atria and two ventricles
and two vascular circuits. This animal is
a. a Mountain Bluebird. b. a fire-bellied toad. c. a trout. d. a lobster. e. more than one of these
Autopolyploidy is a speciation process that begins with an event during
A) habitat selection. B) copulation. C) meiosis. D) embryonic development. E) hybridization.
The discovery that ATP is a pain-signaling factor immediately suggested what possible therapeutic approach to alleviate chronic pain?
A. treat with an ATP receptor antagonist B. create large intracellular aggregates of ATP C. block the synthesis of ATP inside cells D. use electric stimulation on pain centers of the brain