Darwin Evolution

What was Darwin trying to get people to understand when he sketched his "tree of life"?

• All organisms are related.

• Some trees naturally produce larger fruit.

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Which is the definition of artificial selection?

• Humans find traits they like in organisms and decide which organisms will reproduce.

• Organisms must compete for food, water, and living space.

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Choose the ancient ancestor of the horse.

• woolly mammoth

• glyptodon

• hyracotherium

• trilobite

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Changes in body parts, like ears and trunks, and behaviors, like camouflage , that help an organism survive in its environment are called?

• artificial selection

• adaptations

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_______ describes how well an organism can survive and reproduce in its environment.

• struggling

• fitness

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is a process by which organisms that are most suited to their environment survive and reproduce successfully.

• natural selection

• acquired traits

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All species, living or extinct, are Descended from ancient Common ancestors. This is the definition of?

• common descent

• descent with modification

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The African and Asian elephants do not look exactly like their ancient ancestor the woolly mammoth. This is an example of ?

• descent with modification

• common descent

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Darwin traveled the world over 5 years studying

• only plants

• only animals

• plants and animals

Members of a population must compete for food, water, and living space when overpopulation or overcrowding happens.

• Survival of the Fittest

• Struggle for Existence

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