Which of the following diseases is a DNA virus?
a. polio
b. rabies
c. measles
d. smallpox
e. influenza
d
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The amino acid referred to as the "helix breaker" (because it lacks the hydrogen atom needed for hydrogen bonding) is
A) leucine. B) proline. C) methionine. D) valine. E) phenylalanine.
As altitude increases, ____
a. PO2 increases b. PO2 decreases c. PCO2 increases d. PCO2 decreases e. PN2 increases
The type of reproductive isolation in which two populations are separated due to the sperm cells of one not being able to recognize the egg cells of the other is
A. hybrid inviability. B. gametic isolation. C. temporal isolation. D. hybrid infertility. E. ecological isolation.
When a yellow-seeded pea plant with the genotype Yy produces gametes, what will be the genotype(s) of the gametes?
A) All will be YY. B) Half will be Y, and half will be y. C) All will be Yy. D) They will be either all Y or all y. E) Half will be YY, and half will be yy.