A cell containing 2% dissolved materials is placed in a solution consisting of 4% solute. The net movement of ____ molecules will be ____ the cell due to osmosis.
A. solute, into
B. solute, out of
C. water, into
D. water, out of
D. water, out of
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In the figure above, which of the arrows represents the carrying capacity?
A) arrow A B) arrow B C) arrow C D) Carrying capacity cannot be found in the figure because species under density-dependent control never reach carrying capacity.
Which of the following is true of the actinomycetes?
A. Some are photosynthetic. B. They closely resemble the fungi in morphology. C. They divide by budding. D. They are unique among prokaryotes in producing sexual spores.
The presynaptic neuron and postsynaptic neuron do not directly contact each other because
a. one would inhibit the actions of the other. b. they never grow to sufficient length. c. the synaptic vesicles keep them apart. d. this would cause continuous impulse transmission. e. acetylcholine prevents this action.
Which statement is true regarding kidney stones?
A. Their removal always requires surgery. B. Most of them block a ureter or urethra. C. They are made of uric acid and calcium. D. They cause tumors in the kidney. E. They occur as a result of diabetes mellitus.