Question

Under mechanism of evolution, the work by Hugo de Vries reported large difference arising suddenly in a population of which plant:

• A. Peas
• B. Rose
• C. Evening Primrose
• D. Jasmine

Hint:

Hugo de Vries proposed mutation theory based on his work on evening primrose.

Answer 1

The Correct Option is C

Concept:
Hugo de Vries proposed the mutation theory of evolution. According to this theory, new species may arise through sudden heritable changes called mutations.

Step 1: Identify the plant studied by Hugo de Vries.
Hugo de Vries worked on Oenothera lamarckiana, commonly known as evening primrose. \[ \textit{Oenothera lamarckiana}=\text{Evening Primrose} \]

Step 2: Link with mutation theory.
He observed sudden large variations in evening primrose and explained them as mutations. \[ \text{Sudden variation} \rightarrow \text{Mutation} \]

Step 3: Final answer.
Thus, the plant was evening primrose. \[ \therefore \text{Correct Answer is (C)} \]