Which of the following may result from eating tuna sashimi (raw fish)?
A. botulism
B. norovirus infection
C. polio
D. salmonellosis
E. saxitoxin intoxication
Answer: E
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All of the following are mechanisms of thermoregulation in ectothermic animals EXCEPT
A. countercurrent heat exchangers. B. changing the rate of heat production by muscular activity. C. changing the rate of heat loss by vasodilation and vasoconstriction. D. relocating to cool areas when too hot or warm areas when too cold. E. insulation in the form of feathers or fur.
If a mutated region on chromosome 15 is inherited from the father, the child will have Prader-Willi syndrome;
however, if the same mutated region is inherited from the mother, the child will have Angelman syndrome. This is an example of: a. epigenetic inheritance. b. genetic inheritance. c. gene amplification. d. eukaryotic operons. e. repressible genesIf a mutated region on chromosome 15 is inherited from the father, the child will have Prader-Willi syndrome; however, if the same mutated region is inherited from the mother, the child will have Angelman syndrome. This is an example of: a. epigenetic inheritance. b. genetic inheritance. c. gene amplification. d. eukaryotic operons. e. repressible genes
Which is NOT an example of evolution?
A) A dog learning how to open the cabinet where its food is kept B) Annual changes in the flu virus due to mutations C) Flightless birds living on islands without predators D) The development of antibiotic-resistant bacteria E) The 2- to 3-year effectiveness of most commercial pesticides in killing insects
In several mammals, including some rat and shrew species, the presence of two X chromosomes means the animal will be a female, whereas having just one X chromosome dictates maleness. This type of sex determination is most similar to:
A. other mammals. B. insects. C. bees. D. birds.