For speciation to occur there must be

A) sexual reproduction.
B) genetic variation.
C) isolation.
D) natural selection.


Answer: B

Biology & Microbiology

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In vertebrates, the location of spinal cord damage determines the region of the body that is impaired. This is a product of:

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Which of the following is not a net product or reactant of photosynthesis?

A. carbon dioxide B. glucose C. water D. oxygen E. ATP

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Name at least three applications for examining sequence variants such as RFLPs

What will be an ideal response?

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The parasitic Rhagoletis flies show such a preference for either hawthorn or apple trees that they are no longer interbreeding populations. What type of speciation does this scenario illustrate?

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