Question

(a) What is common for Cuscuta, ticks and leeches ? 

(b) Name the substances on which the following enzymes act in the human digestive system : 

(i) Trypsin (ii) Amylase (iii) Pepsin (iv) Lipase 

(c) Why does absorption of digested food occur mainly in the small intestine ?

Answer 1

(a) Parasitic mode of nutrition. 

(b) 

(i) Proteins

(ii) Starch 

(iii) Proteins 

(iv) Fats. 

(c) Absorption of digested foods occurs mainly in the small intestine due to the presence of a large number of finger like projections called villi.