Undifferentiated cells that can divide and specialize to form a variety of different cells are called:a
differential cells.
b. mother cells.
c. somatic cells.
d. stem cells.
e. morphogens
d
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Telomerase is fully active in _____ and _____ cells, but almost completely inactive in ____ cells
A. germ; somatic; stem B. germ; stem; somatic C. stem; blood; germ D. somatic; blood; germ E. somatic; germ; stem
The earliest hominin discovered to date, in a dry lake bed in Chad, belongs to which genus?
a. Homo b. Ardipithecus c. Sahelanthropus d. Australopithecus e. Aegyptopithecus
Which of the following is not a major function of proteins in the cell membrane?
a. acting as receptors b. anchoring cells to other structures c. forming the entire glycocalyx d. forming channels
Which is not true of viruses?
A. They replicate only inside host cells. B. They are acellular. C. They infect animal and plant cells only. D. They can exist in an intracellular or extracellular phase. E. They can be observed with an electron microscope.