A cladogram is based on:
a. homologous characteristics.
b. homoplastic characteristics.
c. polyphyletic taxa.
d. fossil evidence only.
e. derived characters only.
A
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If a gene has two alleles, and allele A has a frequency of 83%, then allele a has a frequency of ____
Fill in the blank with the appropriate word.
A current problem in modern medicine is the development of drug resistance mutations. This occurs when a mutation arises in a disease-causing microbe making it resistant to a drug and thus rendering the drug useless in treating a specific disease. Many useful drugs are competitive inhibitors of specific enzymes, and the drug-resistance mutations prevent the binding of the drug. These types of mutations, in addition to preventing competitive inhibitor binding, can also sometimes reduce the activity of the enzyme. Why is that the case?
A. These mutations most likely affect an allosteric site on the enzyme B. These mutations lower the activation energy of the reaction catalyzed by the enzyme C. These mutations most likely change the shape of the active site of the enzyme D. Binding to the competitive inhibitor is essential for the function of the enzyme
During a malaria infection, Plasmodium falciparum grow inside of human cells as
A. autotrophs. B. heterotrophs. C. phototrophs. D. heterotrophs and autotrophs. E. autotrophs and phototrophs.
Population increases may be stopped by reduced resources or by the buildup of ________
Fill in the blank(s) with correct word