Built-in checkpoints ____ stop the cell cycle from proceeding if certain conditions are not met
a. before and after G1 phase
b. during S phase
c. before G2 phase
d. before and after S phase
e. before anaphase
ANSWER: a
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The fossil record indicates that the first vascular plants possessed roots
A. true B. false
True multicellularity is a major characteristic of
A. all eukaryotes and a few prokaryotes. B. animals and plants only. C. eukaryotes only. D. protists, plants, and animals. E. prokaryotes and protists.
For a molecule to be reduced, it gains electrons from the environment. How else is a molecule reduced?
a. gaining hydrogen atoms b. losing hydrogen atoms c. gaining oxygen atoms d. losing oxygen atoms e. both losing hydrogen atoms and gaining oxygen atoms
Linked genes do not follow the typical patterns of inheritance
a. true b. false