The cell plate in dividing plant cells is composed of _____
a. microfilaments
b. the cytoplasmic membrane
c. vesicles with wall-building materials
d. Golgi bodies
e. microtubules
ANSWER: c
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Indicate whether the statement is true or false
Which of the following conducting cells are associated with xylem?
A. sieve-tube members & vessel elements B. vessel elements & companion cells C. tracheids & sieve-tube members D. tracheids & vessel elements E. sieve-tube members & companion cells
Molecules assisted by carrier proteins may cross a selectively permeable membrane by
A) facilitated diffusion. B) active transport. C) osmosis. D) simple diffusion. E) endocytosis.
The exchange of gases between the lungs and the blood occurs by the process of
Select one: a. diffusion. b. osmosis. c. filtration. d. active transport. e. ionic bonding.