Direction for: In each of the following questions a statement of Assertion is given followed by a corresponding statement of Reason just below it. Of the statements mark the correct answer as
Assertion Thick layers of muscles are present in the wall of alimentary canal. Reason These muscles help in the mixing of food materials with the enzymes coming from different glands in the alimentary canal.A) extinction of these species from other regions
B) continental separation
C) absence of terrestrial route to these places
D) retrogressive evolution
Correct Answer: A
Solution :
Thick layer of muscles are present in the alimentary canal. These muscles facilitate the movement of food particles through alimentary canal. Large food particles are broken down into small, semi liquid particles by the action of these muscles. Later also help in the forward flow of food materials and mixing of enzymes coming from different glands related to alimentary canal.
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