When endocytosis brings organic matter into the cell, the process is called
a. simple diffusion.
b. bulk flow.
c. osmosis.
d. phagocytosis.
e. facilitated diffusion
D
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Based on what the chapter describes about the melting temperature of fatty acids, which of the following would be likely to increase the stability of a lipid bilayer?
A. an increase in unsaturated fatty acids B. an increase in saturated fatty acids C. a decrease in overall tail length D. an increase in unsaturated fatty acids and an increase in saturated fatty acids E. an increase in saturated fatty acids, and a decrease in overall tail length
What did the researchers conclude based on the data in figure (a)?
A. Endostatin shrunk tumors without development of resistance.
B. Endostatin shrunk tumors but resistance developed.
C. Cyclophosphamide delayed the growth of tumors without development of resistance.
D. Cyclophosphamide delayed the growth of tumors but resistance developed.
E. Tumors in untreated cells shrank in size.
Membrane cycling is controlled in the cell by
__________ and __________. Fill in the blank(s) with the appropriate word(s).
What is the difference between microevolution and macroevolution?
A) Microevolution deals with microscopic organisms, whereas macroevolution deals with larger ones. B) Microevolution describes changes within a population over a short period of time, whereas macroevolution describes larger changes such as the formation of new species over longer periods of time. C) Microevolution describes what happens in small populations, whereas macroevolution deals with large populations. D) Microevolution is hypothetical because changes are too small to be observed, whereas macroevolution is detectable.