HORTICULTURE

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HORTICULTURE SCIENCE

PLANT BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Suppose Priestley repeated his experiment using many kinds of plants besides mint, and that when different plants were placed under the jar the candle remained lighted for different periods of time. What would be a logical conclusion from these experiments?
A
Different plants require different amounts of light
B
Different plants require different amounts of water
C
Different plants release different amounts of carbon dioxide
D
Different plants release different amounts of oxygen
Explanation: 

Detailed explanation-1: -Answer and Explanation: In the absence of light, such as during the night, plants stop the photosynthesis process and switch primarily to respiration.

Detailed explanation-2: -Which scientist showed that plants need light to grow? Ingenhouz, Priestley (The result of Priestley and Ingenhousz’s exp showed that light is necessary for plants to produce O2).

Detailed explanation-3: -As photosynthesis progresses, the level of carbon dioxide will increase.

Detailed explanation-4: -A student exposed two plants to only red light and two plants to only green light. Which plants should grow better? The plants in the red light would grow better because plants reflect green light, but do not absorb it, so the plants in green light would not get as much light to carry out photosynthesis.

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