Question 39
Two green plants are kept separately in oxygen-free containers, one in the dark and the other in continuous light. Which one will live longer? Give reasons

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Solution

Plant kept in continuous light will live longer, because it will be able to produce oxygen required for its respiration by the process of photosynthesis.

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Question 39
Two green plants are kept separately in oxygen-free containers, one in the dark and the other in continuous light. Which one will live longer? Give reasons

Q. Two green plants are kept separately in oxygen free containers, one in the dark and the other in continuous light. Which one will live longer?

Two green plants are kept separately in oxygen-free containers, one in the dark and the other in continuous light. The one in dark will live longer.

Give scientific reasons.

(1) Breathing rate increases during vigorous exercising.

(2) Translocation is needed in all higher plants.

(3) The plants are kept in dark before determining the factors essential for photosynthesis.

(4) It is necessary to separate oxygenated blood from the deoxygenated blood in mammals.

Q. Assertion :In some plants flowering depends only on a combination of light and dark exposure. Reason: The site of perception of light or dark duration are the shoot apices of plants.

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Photosynthesis

Standard X Biology

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Question 39 Two green plants are kept separately in oxygen-free containers, one in the dark and the other in continuous light. Which one will live longer? Give reasons

Plant kept in continuous light will live longer, because it will be able to produce oxygen required for its respiration by the process of photosynthesis.

Question 39
Two green plants are kept separately in oxygen-free containers, one in the dark and the other in continuous light. Which one will live longer? Give reasons