NCERT Class VII Science Solutions: Chapter 2-Nutrition in Animals Part 2

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Question 7:

Read the following statements with reference to the villi of small intestine.

  1. They have very thin walls.

  2. They have a network of thin and small blood vessels close to the surface.

  3. They have small pores through which food can easily pass.

  4. They are finger-like projections.

Identify those statements which enable the villi to absorb digested food.

  1. (i), (ii) and (iv)

  2. (i), (iii) and (iv)

  3. (iii) and (iv)

  4. (i) and (iv)

Answer: A

Question 8:

The false feet of Amoeba are used for

  1. Movement only.

  2. Capture of food only.

  3. Capture of food and movement.

  4. Exchange of gases only.

Answer: C

Image of Amoeba

Image of Amoeba

Image of Amoeba

Question 9:

The enzymes present in the saliva convert.

  1. Fats into fatty acids and glycerol.

  2. Starch into simple sugars.

  3. Proteins into amino acids.

  4. Complex sugars into simple sugars.

Answer: B

Question 10:

Cud is the name given to the food of ruminants which is

  1. Swallowed and undigested.

  2. Swallowed and partially digested.

  3. Properly chewed and partially digested.

  4. Properly chewed and completely digested.

Answer: B

Question 11:

Choose the correct order of terms that describes the process of nutrition in ruminants.

  1. Swallowing -> Partial digestion -> Chewing of cud -> complete digestion.

  2. Chewing of cud -> Swallowing -> Partial digestion -> complete digestion.

  3. Chewing of cud -> Swallowing -> Mixing with digestive juices -> digestion.

  4. Swallowing -> Chewing and mixing -> Partial digestion -> complete digestion.

Answer: A

Question 12:

Cellulose-rich food substances are good source of roughage in human beings because

  1. Human beings do not have cellulose-digesting enzymes.

  2. Cellulose gets absorbed in the human blood and converts into fibres.

  3. The cellulose-digesting bacteria convert cellulose into fibres.

  4. Cellulose breaks down into smaller components which are egested as roughage.

Answer: A

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