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1. Overproduction-some survive and some don't.
2. Inherited Variation-combination of parental and individual traits.
3. Struggle to Survive-
4. Successful Reproduction-

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-Naturalist
-Studied the Galapagos Islands, and was fascinated by the finches.
-Noticed differences in the bird's beak lengths and how that related to the type of food they had.
-He studied Thomas Malthus.
-He proposed the theory of natural selection.

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the gradual development of something, especially from a simple to a more complex form

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the human practice of breeding animals or plants that have certain desired traits

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a genetically determined trait

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Why do We Think Whale's Ancestors Walked?

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Why do We Think Whale's Ancestors Walked?

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Today's whales have tiny hip bones, something you would only see on a land animal because they need them to walk, where as something living in the water does not. They would only have hip bones if they were passed down, leading us to believe their ancestors walked.

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What do cats, bats, and more have in common? Similar arm bone structure. We can see how/if animals are related through the structure of their bones.

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Importance of Fossils and the Fossil Record?

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Importance of Fossils and the Fossil Record?

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Without the fossil record and fossils, we wouldn't be able to learn about the past, and see how us humans are affecting the organisms on the earth.

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Fossils buried in the Earth's crust can let us trace back millions of years and compare organisms from then to now.

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a historical sequence of life indicated by fossils found in layers of the Earth's crust

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the trace or remains of rock and soil stacked on top of each other

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the process in which inherited characteristics within a population change over generations such that new species sometimes rise

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a group of organisms that are closely related and can mate to produce fertile offspring

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a characteristic that improves an individual's ability to survive and reproduce in a particular environment