What % of the Earth's water is contained in the oceans?
a. 25%
b. 92%
c. 70%
d. 65%
e. 50%
c
Biology & Microbiology
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The myelin sheath
a. is formed by the Schwann cell. b. speeds up the transmission of impulses. c. does not surround all nerves. d. extends from node to node. e. all of these
Biology & Microbiology
The earliest hominin fossils have been found in ____.
A. Africa B. Asia C. Australia D. the South Pacific E. Europe
Biology & Microbiology
Why do some evolutionary biologists have philosophical concerns about using distance methods to construct evolutionary trees?
What will be an ideal response?
Biology & Microbiology
Which of the following molecules controls progress of the cell cycle?
a. anucleic acids b. checkpoint proteins c. phospholipids d. adenosine triphosphate e. adhesion substances
Biology & Microbiology