Who proposed the theory of evolution by natural selection?

Charles Darwin and Alfred Russel Wallace independently proposed the theory of evolution by natural selection.

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What was Lamarck's theory of evolution?

Lamarck's theory suggested that organisms could acquire traits during their lifetime and pass these traits to their offspring.

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Why was Lamarck's theory considered incorrect?

Lamarck's theory was disproven because acquired characteristics do not alter an organism's DNA and thus cannot be inherited.

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What key observation did Darwin make about species?

Darwin observed that individual organisms within a species show a wide range of variation for specific traits.

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How did Darwin explain the diversity of species?

Darwin proposed that species gradually develop over time through natural selection, where those best adapted to their environment survive and reproduce.

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What is the main difference between Lamarck's and Darwin's theories?

Lamarck's theory involved inheritance of acquired traits, while Darwin's theory involved natural selection of existing variations.

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Why did some people initially reject Darwin and Wallace's theory?

Darwin and Wallace's theory was initially rejected due to religious conflict, lack of evidence, and the unknown mechanism of inheritance.

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How do giraffes' long necks exemplify natural selection?

Giraffes with longer necks could reach more food and had a survival advantage, leading to their traits being passed on over generations.

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