Gibberellic acid:
A. stimulates fruit formation.
B. inhibits photosynthesis.
C. stimulates stem elongation.
D. maintains seed dormancy.
E. is overexpressed in semidwarf varieties of
plants.
C
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The ________ resemble the ancestor of all animals
a. choanoflagellates b. dinoflagellates c. amoeboflagellates d. euglenoids e. ciliates
DNA polymerase
a. is an enzyme. b. adds new nucleotides to a strand. c. proofreads DNA strands to see that they are correct. d. derives energy from free nucleotides for strand assembly. e. is all of these
Diffusion of morphogens—products of master
genes—creates gradients that cause the differential expression of other genes such as __________, which govern the formation of specific body parts. Fill in the blank(s) with the appropriate word(s).
At rest, each cardiac cycle takes 0.8 seconds and during half of that time (0.4 seconds), both atria and ventricles are relaxed.
a. true b. false