Two oxygen atoms joined to each other by the sharing of two pairs of electrons form a(n):
A. hydrogen bond.
B. single bond.
C. ionic bond.
D. double covalent bond.
Answer: D
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The number of similar anatomical parts called whorls that make up a complete flower is
A. five. B. two. C. one. D. four. E. three.
The portion of a flower that receives the pollen is the
A. ovary. B. anther. C. stigma. D. style. E. sepal.
Since all action potentials are identical, the intensity of a sensation depends on:
a. whether a myelinated or unmyelinated neuron has been stimulated. b. the duration of the stimulation. c. whether the neuron stimulated is a pre- or postsynaptic neuron. d. the total number of neurons stimulated and the frequency of their discharge. e. the presence of an EPSP or IPSP, which allows for a graded response.
Prokaryotes undergo a process that produces cells that are identical. This process is called
A. mitosis. B. binary fission. C. syngamy. D. conjugation. E. meiosis.