The water strider shown in the figure above is able to stand on water because of the ____ of water
a. covalent bonds
b. surface tension
c. van der Waals forces
d. density
e. hydration layer
ANSWER: b
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Suppose that the dinucleotide in the accompanying figure were cleaved with the enzyme spleen diesterase, which breaks the covalent bond connecting the phosphate to C-5'
After such cleavage, to which nucleoside is the phosphate now attached?
Spherical bacteria that occur in clusters are bacilli.
a. true b. false
The process by which haploid cells are produced from diploid cells is called
A. meiosis. B. sexual reproduction. C. reduction. D. mitosis. E. fertilization.
Which of the following types of nerves is not covered by a protective myelin sheath?
A. nerve fibers within the PNS B. long axons C. white matter of the CNS D. axons of the CNS E. gray matter of the CNS