What does the 48 hour chill–fever pattern in humans coincide with in the plasmodial life cycle?
a. development of sporozoites
b. gamete maturation
c. release of merozoites from erythrocytes
d. transfer of sporozoites from erythrocytes into liver cells
Answer: C
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Gas exchange is more difficult for aquatic animals with gills than for terrestrial animals with lungs because _____
A) water is less dense than air B) water contains much less oxygen per unit volume than air C) gills have less surface area than lungs D) gills allow only unidirectional transport E) gills collapse in air
According to the modern synthetic theory of evolution, the accumulation of mutations over time
results in
a. microevolution. b. adaptation. c. an increase in genetic variation. d. speciation. e. macroevolution.
Hershey and Chase tagged the DNA of viruses with radioactive phosphorus, and their protein coats with radioactive sulfur. When the viruses were allowed to infect bacteria, what did the viruses transfer to the bacteria?
A. radioactive phosphorus B. neither radioactive phosphorus nor sulfur C. radioactive phosphorus and sulfur D. radioactive sulfur
The impact of a single gene on more than one characteristic is called
a) incomplete dominance b) epistasis c) polygenic inheritance d) codominance e) pleiotropy