Which of the following is TRUE of a genetic mutation?
A. It always produces harmful effects.
B. It never affects protein structure or function.
C. It is not a mechanism through which biological evolution occurs.
D. It happens quite frequently in a population.
E. It generally produces a change in the DNA sequence of a gene.
Answer: E
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Bacterial sexually transmitted diseases include all of the following except
A. gonorrhea. B. syphilis. C. chlamydia. D. herpes.
Elements that are required in relatively large amounts by microorganisms are called
A. macronutrients. B. meganutrients. C. multivitamins. D. macromolecules.
Two extant species of coelacanths and six species of lungfish are members of which lineage?
a. Petromyzontoidea b. Chondrichthyes c. Actinopterygii d. Myxinoidea e. Sarcopterygii
During which phase of gamete production do sister chromatids separate?
a. meiosis I b. meiosis II c. fertilization d. mitosis I e. mitosis II