Industrial melanism is a term
A. describing the color change induced by living in industrialized areas.
B. explaining that the darker moths have higher mutation rates because of industrialization.
C. describing the evolutionary process in which initially light-colored organisms become dark as a result of natural selection.
D. explaining that the darker moths having higher reproductive success because of their pigmentation.
E. describing the widespread implementation of pollution controls.
C. describing the evolutionary process in which initially light-colored organisms become dark as a result of natural selection.
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Which of the following is an example of how natural selection is responsible for the variation seen in the human population?
A. Africans having a tall and skinny body to dissipate heat B. Inuits in Greenland having a stockier body shape to retain heat C. Africans carrying the sickle trait in areas where malaria is prevalent D. people in the northern regions having less pigmentation in order to obtain more vitamin D E. All the answer options are correct.
Which of the following relationships about nucleotide composition in DNA is TRUE?
A. C+G=A+T B. C+A=G+T C. C=A D. G=T E. C=T
Events X and Y are independent of each other. If the probability of event X occurring is 1 in 4, and the probability of
event Y occurring is 1 in 5, the probability of both events occurring is ____.
a. (1/4)2 + (1/5)2 = (1/16) + (1/25) = (25/400) + (16/400) = 41/400 b. (1/4) + (1/5) = (5/20) + (4/20) = 9/20 c. (1/4)2(1/5)2 = (1/16)(1/25) = 1/400 d. (1/4)(1/5) = 1/20 e. (1/4 + 1/5)2 = (5/20 + 4/20)2 = (9/20)2 = 81/400
What is the Hayflick factor responsible for?
a. tissue senescence b. organ senescence c. organ system senescence d. cellular senescence