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What did Haeckel call the process where an organism's development mirrors its species' evolution?
Ontogeny Recapitulates Phylogeny
Survival of the Fittest
Natural Selection
Evolutionary Recapitulation
Answer
Haeckel called the process where an organism's development mirrors its species' evolution "ontogeny recapitulates phylogeny." This means that an organism's development from a single cell to an adult form repeats the evolutionary history of its species. For example, the human embryo goes through stages that resemble the embryos of fish, amphibians, reptiles, and mammals. This suggests that all animals share a common ancestor.
Exploring the Extraordinary: The Remarkable Life of Ernst Haeckel
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