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Question

Who performed a series of experiments that revealed the essential role of air in the growth of green plants?


A
Joseph Priestly
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B
John Priestly
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C
Lavoisier
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D
None of the above
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Solution

The correct option is B Joseph Priestly
Priestly observed that a burning candle in a closed bell jar soon gets extinguished. Similarly, a mouse would soon suffocate in a closed space of the bell jar. When he placed a mint plant in the same bell jars, he found that the mouse stayed alive and the candle when lighted from outside continued burning in the presence of the mint plant. Priestly hypothesized as follows: ‘Plants restore the air which helps in breathing of animals and burning candles use it’.

Biology

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