Questions for practice 9th Biology€¦ · organic wastes of plants and animal origin by the...

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Transcript of Questions for practice 9th Biology€¦ · organic wastes of plants and animal origin by the...

Page 1: Questions for practice 9th Biology€¦ · organic wastes of plants and animal origin by the activity of earthworms. 37. Commercially produced synthetic chemical substances added
Page 2: Questions for practice 9th Biology€¦ · organic wastes of plants and animal origin by the activity of earthworms. 37. Commercially produced synthetic chemical substances added
Page 3: Questions for practice 9th Biology€¦ · organic wastes of plants and animal origin by the activity of earthworms. 37. Commercially produced synthetic chemical substances added
Page 4: Questions for practice 9th Biology€¦ · organic wastes of plants and animal origin by the activity of earthworms. 37. Commercially produced synthetic chemical substances added