The center for control of motor skills and posture is the ____
a. cerebrum
b. medulla oblongata
c. cerebellum
d. brain stem
e. hypothalamus
ANSWER: c
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Which of the following are possible reasons for the high level of angiosperm diversity?
A. Animal pollinators will often find rare individuals, facilitating reproduction. B. Wind dispersal favors rare species, whereas insects are able to find common species.
In E. coli cells when lactose is absent from the environment,
A. large amounts of b-galactosidase, lactose permease, and galactosidetransacetylase are made. B. trace amounts of b-galactosidase, lactose permease, and galactosidetransacetylase are made. C. no b-galactosidase, lactose permease, andgalactosidetransacetylas are made. D. the lac operon is induced. E. polycistronic mRNA levels would be very high.
In bone, crystals of calcium phosphate impregnate the extracellular matrix containing fibers of
A. myosin. B. actin. C. collagen. D. troponin. E. chitin.
Which of the following would be of LEAST value in DNA profiling?
A. analysis of SNPs (single nucleotide polymorphisms) B. sequencing blood group alleles C. mitotyping D. STR (short tandem repeat) analysis