True multicellularity is a major characteristic of
A. all eukaryotes and a few prokaryotes.
B. protists, plants, and animals.
C. prokaryotes and protists.
D. animals and plants only.
E. eukaryotes only.
Answer: E
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If a scientist were studying the interaction of different proteins in the regulation of insulin secretion from a pancreatic cell, he or she would be studying
A. genomics. B. proteomics. C. cell biology. D. both genomics and proteomics. E. both proteomics and cell biology.
Slime molds are classified as
a. animals. b. fungi. c. plants. d. protists.
In the cell cycle, cells can progress from G1 to S to G2, and to mitosis and cytokinesis. The timing of these events is controlled by which of the following?
a) cyclins b) cyclin-dependent protein kinases (Cdks) c) actin myofilaments d) centrosome e) cyclin-Cdk complexes
Nitrogen-fixing bacteria provide other organisms with usable nitrogen in the form of ________.
Fill in the blank(s) with the appropriate word(s).