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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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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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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