http://www.outdoorlanternsonsale.com/ultraviolet-led/
Which of the following would stop evolution by natural selection from occurring?
A.if humans become extinct because of a disease epidemic
B.if a thermonuclear war killed most living organisms and changed the environment drastically
C.if ozone depletion led to increased ultraviolet radiation which caused many new mutations
D.if genetic recombination and mutation stopped and organisms could only reproduce asexually
E.all of these
D is the correct answer.
Natural selection exists apart from humans, and continues regardless of mass extinction. Increased mutation rate speeds up natural selection.
However, if mutation ceased, no new traits could arise, and evolution would halt.
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