Assuming the gardener continues to spray the herbicide for five years, do you think the weed
population will evolve?
a. Yes, there will be more individuals in the population with the herbicide-resistant allele.
b. No, there will be no change in the genetic composition of the population.
c. Yes, the population will have evolved because speciation will have occurred.
d. No, evolution cannot occur over such a short time period.
A
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An example of an "emerging virus" (a virus in a new host) with a lethality rate in excess of 50% is
A. influenza virus. B. Ebola virus. C. hepatitis B. D. variola virus. E. yellow fever.
What is the key concept addressed by the question?
What will be an ideal response?
The point at which this neuron will be able to
generate another action potential is indicated by a. A.
b. B. c. C. d. D. e. E.
Which of the following foods has the lowest water content?
a. Butter b. Whole grain bread c. Tomato d. Sirloin steak