In earthworms, moist surface is necessary for oxygen to be absorbed and carbon dioxide to be given off.

False

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True

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Q. In earthworms, moist surface is necessary for oxygen to be absorbed and carbon dioxide to be given off.

Q. Breathing rate in humans is fast. Is there a sufficient time in lungs , for oxygen to be absorbed and for the carbon dioxide to be released? Justify your answer.

Which pigment is necessary in order for plants to convert carbon dioxide and water, in the presence of sunlight, into oxygen and glucose?

Read the following sentences about photosynthesis.

(i) Sunlight, carbon dioxide, chlorophyll, and water are necessary.

(ii) Oxygen is absorbed.

(iii) Leaves carry out photosynthesis.

(iv) Proteins are made during photosynthesis.

Choose the correct pair of sentences that are true to photosynthesis.

Which of the following statements are correct?

(i) Sunlight, carbon dioxide, chlorophyll and water are necessary for photosynthesis.
(ii) Oxygen is absorbed from the atmosphere during the process of photosynthesis.
(iii) Leaves carry out photosynthesis.
(iv) Proteins are made during photosynthesis.

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