De Vries gave his mutation theory on organic evolution while working on
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Oenothera lamarckiana
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Drosophila melanogaster.
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Pisum sativum.
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Althea rosea
A
Correct answer
Explanation
In 1890 the Dutch geneticist Hugo de Vries discovered Oenothera lamarckiana or the evening primrose of Lamarck, growing as a parkland-escape on an abandoned field near Hilversum. In this plant de Vries believed he had found evidence that Charles Darwin was wrong.