How do gap junctions differ from desmosomes?
a. A gap junction bridges the space between cells.
b. A gap junction is a much larger space between cells.
c. A gap junction provides communication between cells.
d. A gap junction can control the passage of materials between cells.
e. A gap junction requires the use of ATP to open and close its channels.
c
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Oceans cover what portion of the earth’s surface?
a. less than 10 percent b. more than 80 percent c. about 50 percent d. approximately 70 percent e. barely 20 percent
Which enzyme cuts dsRNA into 21-25 bp fragments during RNAi?
What will be an ideal response?
A sorus is ____.
A. a fern spore B. the fern gametophyte C. an egg-producing structure D. where the sperms are produced E. a collection of sporangia
Drifting freely in the upper, well-illuminated waters of the ocean, a diverse biological community exists, primarily consisting of microscopic organisms called
A. detritus. B. archaeans. C. bacteria. D. benthos. E. phytoplankton.