Evolution and Natural Selection

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What is evolution?

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Evolution is the process by which different kinds of living organisms develop and change over time through genetic variation and natural selection.

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What is natural selection?

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Natural selection is the process where organisms better adapted to their environment tend to survive and produce more offspring.

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What are adaptations?

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Adaptations are inherited traits that give an organism an advantage in its particular environment.

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What is a fossil?

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A fossil is the preserved remains or traces of a once-living organism, often found in sedimentary rock.

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What are vestigial structures?

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Vestigial structures are body parts that have lost their original function through evolution, such as the human appendix.

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What is mimicry?

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Mimicry is an adaptation where one species evolves to resemble another species for protection or other advantages.

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What is camouflage?

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Camouflage is an adaptation that allows an organism to blend in with its environment to avoid detection by predators.

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What is the fossil record?

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The fossil record is the history of life on Earth as documented by fossils, showing the progression of species over time.

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What is bilateral symmetry?

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Bilateral symmetry is a body plan in which the left and right sides of an organism are mirror images of each other.

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Which organisms lack bilateral symmetry?

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Cnidarians and sponges lack bilateral symmetry; they exhibit radial symmetry instead.