The ones who discovered photoperiodism in plants are -
- AGarner and Allard
- BSteward and Salisbury
- CThimann and Skoog
- DMore than one of the above
- ENone of the above
Show answer and explanation
Correct answer: (a) Garner and Allard
Explanation
Photoperiodism, the response of plants to the length of day and night, was discovered by W. W. Garner and H. A. Allard in 1920. They studied the Maryland Mammoth tobacco, which flowers only when days are short.