Exercise condition:

3
Fill in the blanks with the options given below :
 
1In photosynthesis, food is prepared by the plant using carbon dioxide and in the presence of sunlight.
 
2. In tap root there is a main tap root, and roots arising from it.
 
3. In a tree, is strong, and covered by bark (tough outer layer).
 
4. The surrounds the pistil.
 
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