Which is the largest division of the geologic time scale?
a. eon
b. era
c. epoch
d. period
e. millennium
a
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Which one of the following is least likely to affect the chromatin state in the vicinity of a gene?
A. HATs B. HMG proteins C. SWI/SNF complexes D. Mediator protein
In which stages do internal checkpoints occur during the cell cycle?
a. Near the end of G1 and at the G2–M transition b. Only during metaphase c. Near the end of G1, at the G2–M transition, and during metaphase d. Only at the end of the G2–M transition
Most _____ have many collagen and elastin fibers
a. epithelial tissues c. muscle tissues b. connective tissues d. nervous tissues
Primary producers obtain energy from a(n) __________ source and use it to build organic compounds from inorganic starting materials.
Fill in the blank(s) with the appropriate word(s).