Plants take carbon dioxide from the atmosphere mainly through their:
(i) roots (ii) stem (iii) flowers (iv) leaves
NCERT Solutions for Class 7th Science Chapter 1 Nutrition in Plants Page 10 Exercise Question 12
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The option iv is the correct answer.
=> Plants absorb all the carbon-di-oxide from air. They do this with the help of their leaves. The carbon - di - oxide is diffused through small holes inside the leaves and these holes are known as stomata. (One of these holes is called a stoma. The plural is stomata.)
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