A microbial ________ is a collection of strains that share many stable properties and differ significantly from other groups of strains.
Fill in the blank(s) with the appropriate word(s).
species
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The conversion of a diamond into graphite is a spontaneous reaction. Why are most women walking around with
diamond rings and not graphite rings?
a. inorganic substances, like diamonds, do not react like organic substances b. the transition state is very stable c. the energy of activation is very high d. the free energy of this reaction is too low e. the free energy of this reaction is too high
On day 21 of the menstrual cycle, most progesterone is secreted by the _______ in the ovary.
Fill in the blank(s) with the appropriate word(s).
In a defined medium, _____.
a. the exact chemical composition of the medium is known b. agar is available for microbial nutrition c. blood may be included d. organic chemicals are excluded
In a species of desert lizard, only females are known to exist. When two females court prior to reproduction, it is necessary for one lizard to assume the posture of a male to stimulate the other female to ovulate. This is a case of
A. bisexuality. B. hermaphroditism. C. angiogenesis. D. parthenogenesis.