Question 7
Read the following statements with reference to the villi of small intestine.

i) They have very thin walls.
ii) They have a network of thin and small blood vessels close to the surface.
iii) They have small pores through which food can easily pass.
iv) They are finger-like projections.

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

(a) (i), (ii) and (iv)
(b) (ii), (iii) and (iv)
(c) (iii) and (iv)
(d) (i) and (iv)

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Solution

The answer is option (a).

The inner walls of the small intestine have thousands of finger-like outgrowths. These are called villi (singular villus). The villi increase the surface area for absorption of the digested food. Each villus has a network of thin and small blood vessels close to its surface. The surface of the villi absorbs the digested food materials and through the fluid connective tissue called blood circulate it throughout the body.

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Read the following statements about diseases.

(i) They are caused by germs.

(ii) They are caused due to the lack of nutrients in our diet.

(iii) They can be passed on to another person through contact.

(iv) They can be prevented by taking a balanced diet.

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(a) (i) and (ii) .

(b) (ii) and (iii)

(d) (i) and (iii)

Question 17
Which of the following statements are true about unisexual flowers?

(i) They possess both stamen and pistil
(ii) They possess either stamen or pistil
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(iv) Unisexual flowers possessing only stamens cannot produce fruits

(a) (i) and (iv)
(b) (ii), (iii) and (iv)
(c) (iii) and (iv)
(d) (i), (iii) and (iv)

Which of the following statements are true for flowers?
(i) flowers are always bisexual
(ii) they contain sexual reproductive organs
(iii) they are produced in all groups of plants
(iv) after fertilisation, they give rise to fruits
(a) (i) and (iv)
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (ii) and (iv)

Q. Question 7
Read the following statements with reference to the villi of small intestine.
i) They have very thin walls.
ii) They have a network of thin and small blood vessels close to the surface.
iii) They have small pores through which food can easily pass.
iv) They are finger-like projections.

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

(a) (i), (ii) and (iv)
(b) (ii), (iii) and (iv)
(c) (iii) and (iv)
(d) (i) and (iv)

Q. Identify the statement which give the characteristics that enable villi to absorb the digested food.

A. They have very thin wall.
B. They are finger like projections.
C. They have a network of blood vessels close to the surface.
D. They have small pores through which food can easily pass.

A. C and D only
B. A,B and C
C. A and B only

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Absorption & Assimilation in Small Intestine

Standard VII Biology

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