Ans 2: A change in which chemical composition and chemical properties of the reacting substances undergo a change is called a chemical change. During ripening of fruits or growing of plant into a tree, a chemical change occurs which helps in ripening and growing of plants into tree and cannot be reversed.
Ans 3:Calcium hydroxide, also called slaked lime, Ca(OH)2, is obtained by the action of water on calcium oxide.
Heterotrophic nutrition is a mode of nutrition in which organisms depend upon other organisms for food to survive. They can't make their own food like Green plants. Heterotrophic organisms have to take in all the organic substances they need to survive.
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Explanation:
Ans 2: A change in which chemical composition and chemical properties of the reacting substances undergo a change is called a chemical change. During ripening of fruits or growing of plant into a tree, a chemical change occurs which helps in ripening and growing of plants into tree and cannot be reversed.
Ans 3:Calcium hydroxide, also called slaked lime, Ca(OH)2, is obtained by the action of water on calcium oxide.
Explanation:
Heterotrophic nutrition is a mode of nutrition in which organisms depend upon other organisms for food to survive. They can't make their own food like Green plants. Heterotrophic organisms have to take in all the organic substances they need to survive.
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