The greatest drop in blood pressure occurs in the
a. arteries.
b. arterioles.
c. capillaries.
d. venules.
e. veins.
B
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The feathers of Sinosauropteryx prima are
hypothesized to have served for
a. flight. b. insulation. c. scaring predators. d. camouflage. e. sexual attraction
How is gel electrophoresis used to demonstrate the molecular basis of SCD?
A) by revealing that the protein products of the ?A and ?S alleles have distinctive electrophoretic band patterns B) by revealing variations in the length of a DNA restriction fragment that distinguishes the ?A and ?S alleles C) by revealing variations in the exon splicing of the mRNA products of the ?A and ?S alleles D) by revealing variations in the electrophoretic mobility of proteins and the restriction fragment length polymorphisms of DNA (both A and B) E) by revealing variations in the electrophoretic mobility of proteins, the restriction fragment length polymorphisms of DNA, and the splice variants of the mRNA (A, B, and C)
Two nervous system diseases are food-borne, botulism caused by Clostridium botulinum and listeriosis, a form of meningitis, caused by Listeria monocytogenes. These diseases differ in that
A. listeriosis is associated with contaminated low-acid vegetables, whereas botulism is associated with contaminated infant formula. B. botulism has a very high mortality rate (~50%), whereas listeriosis is readily cured by a course of antibiotics. C. listeriosis primarily affects pregnant women, whereas botulism can affect anyone. D. botulism results from an intoxication, whereas listeriosis is an infection.
Some insects that have an unpleasant taste, such as monarch butterflies, have bright, high-contrast color patterns. Most predators, once they have tasted a monarch, will leave all other monarchs alone in the future
What type of learning has occurred in the predators? A) Imprinting B) Altruism C) Insight learning D) Habituation E) Operant conditioning