What is cell?

(a) Label W, X, Y, and Z.

(b) Which is the covering membrane of X known as?

(c) Which of them contain hydrolytic enzymes?

(d) Which one of them takes part in storage modification and packaging of various chemicals?

Name the phenomenon which helps fresh water unicellular organisms (e.g. Amoeba) continuously gain water in their bodies. Also, name the mechanisms by which these organisms throw out excess of water from their bodies.

(b) Give at least two examples in plants where similar phenomenon in used to gain water.

What is prokaryotic cell?

What is eukaryotic cell?