Continuous cell lines
a) die out after only a few generations.
b) are sometimes called immortal cell lines.
c) are grown in embryonated eggs.
d) are derived from bacteria.
Ans: b) are sometimes called immortal cell lines.
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The genetic information of an organism is coded within that organism's
a. DNA. b. carbohydrates. c. lipids. d. proteins. e. cell membranes.
Rod cells differ from cone cells in that
a. rod cells respond to changes in light intensity, and cone cells detect very dim light. b. rod cells contain pigments which enable the perception of color, and cone cells respond to changes in light intensity. c. rod cells respond to changes in light intensity, and cone cells contain pigments which allow for the perception of color. d. rod cells are responsible for acute daytime vision, and cone cells detect very dim light. e. they are none of these.
The boundary between the middle ear and the
inner ear is the
a. eardrum. b. oval window. c. cochlea. d. stirrup. e. auditory canal
When solutes are unloaded from phloem, what happens to water?
a. It is pumped out of the phloem by active transport. b. It is pumped into the phloem by active transport. c. It leaves the xylem by osmosis. d. It leaves the phloem by osmosis.