alleryRipe oranges gave off a gas that ripened stored bananas. The gas was:
AHydrogen
BEthylene
COxygen
DNitrogen
Answer & Solution
Correct answer: B. Ethylene
1. Cousins noticed the volatile substance in 1910.
2. It hastened ripening of unripe bananas.
3. It was later identified as ethylene.
_Source: syllabus Biology, Chapter 15, Plant Growth and Development._
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