A(n) ________ operon is one whose transcription is decreased by effector molecules.
A. compressible
B. coinducible
C. inducible
D. repressible
E. activated
Answer: D
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A severe disease that is inherited as an autosomal recessive trait is more likely to skip generations in a pedigree than an autosomal recessive trait that causes a harmless phenotypic variant because
A) a person with the harmless variant is less likely to reproduce than a person with the disease. B) a person with an autosomal recessive disease is less likely to be well enough to reproduce than a person with a harmless trait variant. C) all inborn errors of metabolism are dominant. D) a family with an autosomal recessive disease is usually much smaller than a family with an autosomal recessive harmless trait variant.
Neanderthals were members of
a. Australopithecus robustus. b. Homo habilis (early Homo). c. Homo erectus. d. Homo sapiens. e. none of these.
Which of the following is (are) true concerning “low
carb” diets? a. They may produce rapid weight loss. b. Their long-term effects are not known. c. They can result in kidney damage. d. They may promote the increased consumption of saturated fats. e. All of these are true.
One of the focuses of conservation biology is changing human behavior.
a. true b. false