Why do identical twins look alike

That's because identical twins result from one fertilized egg splitting into two during pregnancy. When they're born, identical twins share the same DNA, which explains why they usually look almost exactly alike. Fraternal twins do not share the exact same DNA. In fact, they share only about half the same genes.

Explanation:

Identical twins result from one fertilized egg splitting into two during pregnancy. When they're born, identical twins share the same DNA, which explains why they usually look almost exactly alike. ... Fraternal twins do not share the exact same DNA. In fact, they share only about half the same genes.

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the fossil record provides evidence of a common ancestor to many species.

he forelimbs below belong to four species that descended in a direct line from the ancestral mammal shown above. of the four descendants shown, which species most likely appeared earliest in evolutionary history?