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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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
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
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
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