The highest diversity of plant and animal life occurs in
A) tropical savannas.
B) tropical rain forests.
C) temperate deciduous forests.
D) boreal forests.
B
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Even semi-aquatic reptiles like crocodiles and alligators can spend much of their life on dry land. Which of the following is an example of an adaptation that would allow reptiles to live and reproduce on dry land?
A. internal fertilization and amniotic eggs B. external fertilization C. internal fertilization D. amniotic eggs E. external fertilization and amniotic eggs
Analysis of a certain polymer shows that it contains phosphate groups, ribose groups, and pyrimidines
Based on this information, which of the following is the best description of this compound? a. It is most likely ribonucleic acid. b. It is DNA. c. It is an inorganic compound. d. It contains thymine. e. It is a polypeptide
During the luteal phase, a(n) __________ forms from follicle cells that surround the egg.
Fill in the blank(s) with the appropriate word(s).
Compared to the normal situation, in which actin monomers carry ATP, what do you predict would happen if actin monomers that bind a nonhydrolyzable form of ATP were incorporated into actin filaments?
(a) Actin filaments would grow longer. (b) Actin filaments would grow shorter because depolymerization would be enhanced. (c) Actin filaments would grow shorter because new monomers could not be added to the filaments. (d) No change, as addition of monomers binding nonhydrolyzable ATP would not affect actin filament length.