Multiple choice

De Vries gave his mutation theory on organic evolution while working on

  1. Oenothera lamarckiana

  2. Drosophila melanogaster.

  3. Pisum sativum.

  4. Althea rosea

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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.