A surge in the level of LH indicates that ________ is about to occur
A) ovulation
B) puberty
C) the testosterone peak
D) the progesterone peak
E) menstruation
A
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In the life cycle of bryophytes and seedless vascular plants, meiosis takes place in the
a. gametophyte. b. sporangium. c. archegonium. d. zygote. e. antheridium.
In general, communities that characterize a biome are
arrays of species that are adapted to a. specific temperatures. b. patterns of rainfall. c. soil type. d. each other. e. all of these.
DNA barcoding:
A: is a type of reverse genetics. B: is the most commonly used type of DNA fingerprinting used by the FBI. C: attempts to provide a unique sequence identifier for all life forms. D: is based mainly on repetitive DNA. E: is used for prenatal genetic screening.
A Gram-positive psychrotrophic rod ________ is a frequent contaminant of dairy products and meat and survives phagocytosis.
A. Escherichia coli B. Mycobacterium leprae C. Clostridium perfringens D. Bacillus thuringiensis E. Listeria monocytogenes