A cell that contains a nucleus is called a(n) (prokaryotic/archaeal/eukaryotic) cell
What will be an ideal response?
eukaryotic
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A cell in G0 state ____
a. is actively growing before cell division begins b. has a cleavage furrow and the cytoplasm is beginning to divide c. is actively replicating chromosomes d. is in cytokinesis e. has entered a resting stage and is not actively dividing
There is a population of giraffes. Some have short necks, some have medium-length necks, and some have long necks. If the short-necked individuals are regularly eliminated from the population, this would be an example of
A. disruptive selection. B. sexual selection. C. disfunctional selection. D. directional selection.
Divergence time estimates based on molecular clocks are
A) best interpreted with caution, since they depend on assumptions that are difficult to test. B) likely to be correct regardless of the genes used or the groups of organisms. C) more reliable than divergence dates that are based on analysis of the fossil record.
Occupationally acquired hepatitis C virus infection:
A) is not possible because an effective one-series vaccine is available. B) is most commonly contracted via blood exposure to nonintact skin. C) occurs by ingestion of food that is contaminated with infected feces. D) is related to a contaminated needlestick with visible blood on the sharp.