The amount of energy necessary for an
electron to jump to its next level
a. varies depending on the atom.
b. is exactly equal to what it needs.
c. is always in excess of the needed amount.
d. is exactly twice the energy emitted when
the electron loses energy.
e. is less than the energy emitted when the
electron loses energy.
B
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Which of the following statements is true regarding fungal spores? Select all correct choices
A. They can be formed via asexual reproduction. B. They can be formed via sexual reproduction. C. They are shaped to resist drag (like an airplane wing). D. They are shaped to promote drag (like a parachute). E. They can be dispersed by fruiting bodies.
The photoreceptor for photoperiodism and some other light-initiated plant responses is a group of
blue-green pigments named:a. xanthophyll. b. carotene. c. chlorophyll. d. phytochrome. e. phycocyanin
Alternative forms of a gene (such as those responsible for eye color) are called
A) cyclins. B) alleles. C) receptors. D) sister chromatids. E) telomeres.
Vibrio cholerae produces a toxin that destroys the intestinal epithelium. This leads to massive diarrhea; the diarrhea can kill the human via dehydration but helps the bacteria spread and colonize other humans. What is this relationship?
A. Symbiotic B. Atavistic C. Commensalistic D. Mutualistic