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NCERT · Class 7 · Science

Chapter 2: Nutrition in Animals

Practice each question, then open the answer or worked solution.

Exercise Questions

13 questions
Q11Written answer

Match the items of Column I with suitable items in Column II

Column-I Column-II
a) Salivary gland (i) Bile juice secretion
b) Stomach (ii) Storage of undigested food
c) Liver (iii) Saliva secretion
d) Rectum (iv) Acid release
e) Small intestine (v) Digestion is completed
f) Large intestine (vi) Absorption of water
(vii) Release of faeces
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Column-I Column-II
a) Salivary gland (iii) Saliva secretion
b) Stomach (iv) Acid release
c) Liver (i) Bile juice secretion
d) Rectum (ii) Storage of undigested food
e) Small intestine (v) Digestion is completed
f) Large intestine (vi) Absorption of water
Q12Written answer

Label Fig. 2.11 of the digestive system.

Human digestive system

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Human digestive system

Q13Written answer

Can we survive only on raw, leafy vegetables/grass? Discuss.

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Worked solution

No, we cannot survive only on raw, leafy vegetables because they mainly consist of Cellulose which cannot be digested by us due to lack of cellulose-digesting enzyme in our body.