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The most salient fact was the lack of a mechanism for heredity.

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4w ago

During the mid-nineteenth century, Darwin's theory of evolution lacked understanding of the mechanisms of heredity, specifically the role of genetics and how traits are passed on from one generation to the next. Additionally, the concept of mutations as a source of genetic variation was unknown at that time. Furthermore, the scarcity of fossil evidence and the lack of understanding of Earth's geological history hindered Darwin's ability to provide a comprehensive timeline of evolutionary changes.

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Q: What facts was unavailable to Darwin's theory of evolution in the mid-nineteenth century?
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Was evolution around before natural selection?

The concept of evolution existed before the theory of natural selection. Evolution as a concept dates back to ancient Greek philosophers, while natural selection was proposed by Charles Darwin in the 19th century as a mechanism to explain how evolution occurs.


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Yes, Gregor Mendel's groundbreaking work on inheritance was published in 1866, while Charles Darwin was still alive. However, Mendel's work went largely unnoticed until it was rediscovered and accepted by the scientific community in the early 20th century.


When was natural selection accepted?

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The idea of variation has been present in scientific thought since the 18th century, particularly with the work of Charles Darwin and his theory of evolution by natural selection in the mid-19th century. Variability in living organisms had been observed long before this, but it was Darwin's explanation that gave it a more comprehensive and influential framework.

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