Which of the following drugs specifically targets cell walls that contain mycolic acid?
A. vancomycin
B. penicillin
C. methicillin
D. isoniazid
E. bacitracin
Answer: D
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DNA is characterized by which of the following feature(s)?
A. Ribose B. Single-stranded C. Deoxyribose D. Thymine E. Deoxyribose AND thymine
Which of the following scenarios fits the definition of macroevolution?
a. The divergence of the eastern and western meadowlark birds into two different species b. The increase in the frequency of polydactyly (more than 10 fingers) among the Pennsylvania Amish population c. The general increase in height of the human species over the last 200 years d. The increase in milk production of cows in the early 1900s e. The changes in wing color of the peppered moth over the last 100 years
Which of the following is a requirement for natural selection?
a. variation in individuals b. greater numbers of offspring from those that do not survive c. a long period of time d. low numbers of individuals e. nonheritable traits
You are studying with a classmate who asks you about the concept of a replacement rate. She wants to know what happens to a population if the replacement rate is reached? She also assumes the average human replacement rate is 2.0. What would you tell her?
A. When replacement rate is reached, the population is in equilibrium. The replacement rate is equal to 2.0 to replace both mother and father. B. When replacement rate is reached, the population declines. The replacement rate is greater than 2.0 to make up for declining birth rates. C. When replacement rate is reached, the population is in equilibrium. The replacement rate is greater than 2.0 because some individuals die before they reproduce. D. When replacement rate is reached, the population declines. The replacement rate is lower than 2.0 to make up for increasing birth rates. E. When replacement rate is reached, the population increases. The replacement rate is lower than 2.0 to make up for increasing birth rates.