Which of the following definitions is INCORRECT?
A) endemic: a disease that is constantly present in a population
B) epidemic: a disease that is endemic across the world
C) pandemic: a disease that affects a large number of people in the world in a short time
D) sporadic: a disease that affects a population occasionally
E) incidence: number of new cases of a disease
B
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Kinesis is
A. a movement toward a stimulus. B. a movement away from a stimulus. C. any movement in response to a stimulus, but not necessarily toward or away. D. a movement. E. any movement away from an object.
If there are two alleles for a gene in a population, and the frequency of the dominant allele (p) is .5,
then the frequency of the recessive allele (q) is
a. .5. b. .025. c. .25. d. .75. e. .05.
Which of these is a niche that Cambrian animals occupied?that, as far as we know, their predecessors did not?
A) grazing on microbial mats B) feeding on organic debris C) absorbing nutrients across membranes D) predation while actively swimming E) None of the above.
Godfrey Hardy and Wilhelm Weinberg mathematically proved that as time goes by in a non-evolving
population A. the frequency of homozygotes will increase. B. heterozygotes will increase. C. dominant genes will increase to a 3:1 ratio. D. the proportion of all genotypes will remain constant. E. recessive genes will gradually increase.