If a cell of C. elegans is preparing for division but fails the G2 checkpoint, which of the
following is likely to occur?
a. It will enter the mitotic phase.
b. It will undergo cytokinesis.
c. It will undergo apoptosis.
d. DNA replication will occur.
C
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Most carbohydrates manufactured in leaves and other photosynthetic parts are transported through the phloem to the rest of the plant by the process of
A. transpiration. B. translocation. C. osmosis. D. receptor-mediated transport. E. turgor pressure.
Heterochromatic regions at the ends of chromosomes are
A) centromeres. B) euchromatin. C) telomeres. D) DNA hubs.
A solution with a pH of 9 has ____ times fewer hydrogen ions than a solution with a pH of 6
a. two b. four c. 10 d. 100 e. 1,000
The actual conditions under which an organism exists in nature constitute its
A. resource partition. B. realized niche. C. habitat. D. fundamental niche.