Blood usually continues on from capillaries to
enter ____ in its travel through the human
body.
a. arterioles
b. venules
c. arteries
d. veins
e. other capillaries
B
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In hydroponic culture, what is the purpose of bubbling air into the solute?
A) to keep dissolved nutrients evenly distributed B) to provide oxygen to the root cells C) to inhibit the growth of aerobic algae D) to inhibit the growth of anaerobic bacteria E) to provide carbon dioxide for photosynthesis
In bacteria, fungi, and plants the high internal pressure generated by osmosis is counteracted by the mechanical strength of their
A. plasma membranes. B. organelles. C. cytoskeletons. D. cell walls.
Genes that are exchanged between prokaryotes are contained in ____ molecules
a. pili b. plasmid c. prokaryotic RNA d. nuclear e. protein
The ras gene is an example of a tumor-suppressing gene. Indicate whether the statement is true or false