The autotrophic mode of nutrition requires

(a) carbon dioxide and water.

(b) chlorophyll.

(c) sunlight.

(d) all of the above.

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Solution

(d) The autotrophic mode of nutrition requires carbon dioxide, water, chlorophyll and sunlight.

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Question 3
The autotrophic mode of nutrition in plants requires:

(a) Carbon dioxide and water
(b) Chlorophyll
(c) Sunlight
(d) All of the above

Q. Which of these is/are required for photosynthesis?

(a) Chlorophyll
(b) Sunlight and water
(c) Carbon dioxide
(d) All of these

Organisms having heterotrophic nutrition lack
(a) Sugar.
(b) Chlorophyll
(c) Carbon dioxide.
(d) Oxygen.

Question 1
Which of the following statements about the autotrophs is incorrect?

(a) They synthesise carbohydrates from carbon dioxide and water in the presence of sunlight and chlorophyll.
(b) They store carbohydrates in the form of starch.
(c) They convert carbon dioxide and water into carbohydrates in the absence of sunlight.
(d) They constitute the first trophic level in food chains.

Q. The autotrophic mode of nutrition requires

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The autotrophic mode of nutrition requires (a) carbon dioxide and water. (b) chlorophyll. (c) sunlight. (d) all of the above.

(d) The autotrophic mode of nutrition requires carbon dioxide, water, chlorophyll and sunlight.

The autotrophic mode of nutrition requires

(a) carbon dioxide and water.

(b) chlorophyll.

(c) sunlight.

(d) all of the above.