Write short notes on saprotrophs. Mention a few examples.

What are final products produced after digestion of carbohydrates, proteins and fats?

With the help of a schematic flow chart, show the breakdown of glucose in a cell to provide energy:

(i) In the presence of oxygen (ii) In the absence of oxygen (iii) When there is lack of oxygen.

Mention the role of following in the digestion:
(i) Pepsin

(ii) Saliva

(iii) Villi

(iv) Hydrochloric acid

(v) Mucus