What is common for C uscuta, ticks and leeches?

Name the following:

(a) The process in plants which converts light energy into chemical energy.

(b) Organisms that cannot prepare their own food.

(c) Organisms that can prepare their own food.

(d) The cell organelle where photosynthesis occurs.

(e) The cells which surround a stomatal pore.

(f) An enzyme secreted by gastric glands in stomach which acts on proteins.

Match the terms in column I with those in column II.

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

(i) Trypsin (ii) Amylase

(iii) Pepsin (iv) Lipase

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