Tuesday, April 28, 2020

SOLUTIONS OF REVISION TEST (CH -2) CLASS 7

Ans 1.          1. buccal cavity    2. oesophagus       3. stomach        4 small intestine
                    5. large intestine       6. anus                                           (1 marks for each)


Ans 2.         Pseudopodia                                                                  (1)

Ans 3.        Digestion is a complex process involving: (i) ingestion, (ii) digestion, (iii) absorption,
                  (iv) assimilation and (v) egestion.                                  (1 mark for each word)


Ans 4.     
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

                                                             (1/2 marks for each correct match)


Ans. 5. Cellulose is the carbohydrate that can be digested by ruminants but not by humans because humans lack cellulase enzyme required to digest the cellulose.                                                                                                         (Cellulose  - 1 mark, cellulase - 1 mark)

Ans.6. The various glands such as salivary glands, the liver and the  pancreas secrete digestive juices. 
                                                                                (1 mark each)

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