Gene flow is one way that the gene pool of a population can change. In which of these situations would gene flow occur?
A. Individuals move from one population into another.
B. Mutations in the buds on a tree cause some of its leaves to curl.
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C. A dog breeder uses artificial selection to get healthier puppies.
D. A disturbance causes a random change in allele frequencies.

How do you think earths interior affects what is happening on the surface? 2. how do fossils support the continental drift hypothesis? 3. how does sea- floor spreading support the hypothesis of continental drift? 4.what do scientists observe when they studied the magnetic fields of rocks on the sides of mid-ocean ridges? 5. what is a tectonic plate ? 6. explain mantle convection 7.how can movements of the continents affect earths climate? 8. what occurs during drifting?