Which of the following phrases INCORRECTLY finishes this statement? A genetic disease that causes death in infancy and has an autosomal recessive inheritance pattern can persist in a population because
A. it can be passed on to the next generation by a heterozygous carrier.
B. the deleterious effects of the disease may not occur until after reproductive age.
C. if both parents are carriers, they have a 50% chance of having normal children.
D. only homozygotes for the abnormal allele will have the disease.
E. individuals with one abnormal allele do not show symptoms of the disease.
C. if both parents are carriers, they have a 50% chance of having normal children.
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Which is/are true of viruses?
A. They may suppress the production of MHC Class I protein. B. They may produce an MHC Class I mimic protein. C. They may prevent cell suicide. D. They may bind to MHC class II antigens. E. They may suppress the production of MHC Class I protein, they may produce an MHC Class I mimic protein, AND they may prevent cell suicide.
Although diversity of communities is affected by processes acting on the local level, it is also directly related to regional rates of species production and immigration.
a. true b. false
Desulfovibrio bacteria can perform the following reaction: S6- S2-. These bacteria are
a. Synthesizing sulfur. b. Reducing sulfur. c. Hydrolyzing sulfur. d. Oxidizing sulfur.
Antimicrobial drugs that are derived from the natural processes of some microorganisms and that can inhibit or destroy other microorganisms are specifically known as what?
A) Chemotherapeutic drugs B) Prophylactic drugs C) Semisynthetic drugs D) Synthetic drugs E) Antibiotics