Membrane proteins serve many functions. One of the functions is transportation of substances across the membrane. If a cell biologist placed cells into an environment in which a chemical has been added that blocks the function of only carrier proteins, the process that will be affected is
A. phagocytosis.
B. simple diffusion.
C. osmosis.
D. pinocytosis.
E. active transport.
Answer: E
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The enzymes needed for the breakdown of all categories of ingested food are produced by which organ.
A) liver B) large intestine C) stomach D) pancreas
Club mosses belong to the phylum Bryophyta
____________________ Indicate whether the statement is true or false.
If one excludes the involvement of gender in the situation described in the paragraph above, then the pattern that is apparent in the fossil record is most similar to one that should be expected from
A) pansexual selection. B) directional selection. C) disruptive selection. D) stabilizing selection. E) asexual selection.
Phylogenetic systematics ________ characters.
Fill in the blank(s) with the appropriate word(s).