You're a doctor visiting with a patient, and you remind her to get her flu vaccination this year. She looks at you quizzically and says, "I don't need a vaccination. I got one last year." Which of the following would be the most appropriate biological explanation?
A. " Flu vaccinations wear off after a year, so you should really get another one."
B. "The flu virus evolves very rapidly, so last year's vaccination will not be as effective as this year's vaccination."
C. "Well, you should be okay then."
D. "Well, it is free."
Ans: B. "The flu virus evolves very rapidly, so last year's vaccination will not be as effective as this year's vaccination."
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(a) is derived from the integuments. (b) is produced by the micropyle. (c) surrounds the male gametophyte. (d) is divided into the hypocotyl-root axis and epicotyl.
If an individual that phenotypically has dominant traits is mated to another individual that also has dominant traits and the progeny have both dominant and recessive traits it indicates that
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For a normal, healthy individual, what percentage of whole blood is plasma?
a. 25 percent b. 40 percent c. 45 percent d. 55 percent e. 60 percent
G. F. Gause's experiments with interaction of Paramecium caudatum and P. aurelia resulted in his describing the principle of ________
Fill in the blank(s) with correct word