Pollination begins when pollen is transferred from the ________ to the ________ of a flower.
A. anther, ovary
B. anther, receptacle
C. anther, stigma
D. stigma, embryo sac
E. synergid, egg
C. anther, stigma
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What are the base-pairing rules for DNA?
a. A-G, T-C b. A-C, T-G c. A-U, C-G d. A-T, G-C e. A-T, G-U
The term used to describe the cloning of an
entire plant from a single cell is
a. sexual meiosis. b. tissue culture propagation. c. reduced integration. d. germination mitosis. e. phototropism
Birds associating the bright colors of certain butterflies with an unpleasant taste is an example of
(A) instinct (B) imprinting (C) insight learning (D) trial-and-error learning
Which enzyme is responsible for opening up the dsDNA in order for RNA polymerase to transcribe a gene?
a. DNA helicase b. DNA gyrase c. RNA polymerase d. topoisomerase