Development Of Darwin's Theory Flashcards

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1
Q

What could Darwin not explain in his theory?

A

How variation occurred and the why the evolution of characteristics in fossils wasn’t gradual (lack of fossils discovered)

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2
Q

What is the pentadactyl limb?

A

A limb that has five digits (fingers and thumbs). Amphibians, reptiles, birds and mammals share this characteristic.

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3
Q

What does the pentadactyl limb show us about the evolution of different animals?

A

All of the animals with the pentadactyl limb are derived from a common ancestor.

The limb bone similarities show that the limb wasn’t designed for specific purposes but evolved for swimming, flying, walking etc.

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