The loading of dissolved sugars into the sieve tube elements of phloem is:
a. passive transport.
b. active transport.
c. osmosis.
d. simple diffusion.
e. facilitated diffusion.
B
You might also like to view...
Activities that disrupt the production of melatonin at night also may cause ____
a. heart disease b. cancer c. increasing gonadal output d. pancreas reduction e. too much sleep
Sensory receptors in muscles and joints that detect ________ never adapt
Fill in the blank(s) with correct word
During the cell cycle, MPF activity
A) peaks in S and decreases in G2. B) peaks in G2 and decreases in G1. C) peaks in M and decrease in M. D) peaks in M and decreases at the restriction point. E) peaks in G1 and decreases in G2.
Place the following in order by level of resistance with highest resistance first.
A) prions, endospores, protozoan cysts, fungal spores B) prions, protozoan cysts, fungal spores, naked viruses C) endospores, fungal spores, hyphae, prions D) bacterial vegetative cells, prions, naked viruses, protozoan cysts