Which of the following is necessary in applying the molecular clock approach to determine when HIV first infected humans?
a. A relatively consistent rate of evolutionary change in the virus
b. Multiple samples of the virus taken in different years
c. RNA nucleotide sequence data from the virus
d. All of the listed responses are correct.
e. None of the listed responses are correct.
Answer: d. All of the listed responses are correct.
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Which organ filters blood that has collected wastes from cells throughout the body and maintains the homeostasis of body fluids?
a. kidneys b. heart c. lungs d. Pacemaker
Which one of the following is an important evolution concept that helps prevent organisms from mating across species boundaries?
a. hybrid formation b. postmating isolating mechanisms c. geographic isolation d. natural selection
What structure stores waste produced in the cell?
A. vacuole B. nucleus C. lysosome D. pinocytic vesicle
Human infection with Erysipelothrix rhysiopathiae takes a milder form and is known as:
A. Erysipelas B. Erysipeloid C. Impetigo D. Necrotizing fasciitis