CDKs are protein kinases. They function to ____
a. add phosphate groups to target proteins
b. check for the attachment of spindle fibers to chromosomes
c. remove phosphate groups from cyclins
d. arrest the cell cycle
e. allow the cell cycle to work forward or backward
A
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Mechanoreceptors are excited by:
a. tissue damage b. temperature change c. chemical energy of specific substances d. light e. pressure, a change in position, or acceleration
As a general rule, the small intestine of a pig or human is
a. about 60 cm long. b. about 1.5 m long. c. about as long as the individual is tall (or long in the case of the pig). d. about five times the height of the individual.
The diffusion of water across a membrane is known as ____
a. osmosis b. active transport c. facilitated diffusion d. movement through a channel e. carrier mediated transport
Cells become progressively organized into recognizable structures through a process known as:
a. morphogenesis. b. determination. c. cell differentiation. d. pattern formation. e. growth.