Mention the benefits of "Green Revolution" and "White Revolution" in our country.

Draw a neat and labeled diagram of the life cycle of a silk moth and answer the following questions.

(a) What are the four stages in the life cycle of a silk moth?

(b) Write the specific names for the larva and pupa of the silk moth.

(c) Name the process of recovering threads from the killed cocoons.

(d) Name a suitable plant on which these insects grow and develop successfully.

(e) Which kind of fibres can be made by using the threads from the cocoons ?

Draw a neat and labeled diagram of the 'Internal structure of yeast'. Answer the following questions.

(a) Name the kingdom to which the yeast belongs.

(b) Is it unicellular or multicellular?

(c) Write the specific mode of nutrition in this organism.

(d) What are the suitable medium/places where yeast can grow successfully?

(e) Name two vitamins which are found in yeast.

(f) Write the economic importance of yeasts in two points.

Draw a neat and labelled diagram of a bacterium showing its internal structure. Answer the following questions.

(a) Name the kingdom to which bacteria belongs.

(b) Are they prokaryotes / eukaryotes?

(c) What are the four kinds of bacteria on the basis of their shape? Write the specific terms with their shapes.

(d) Name the outermost protective covering of a bacterium.

(e) What are the four suitable conditions required for the growth and development of bacteria?

(f) Name two kinds of respiration which can take place in bacteria.

(g) Mention the locomotory structure of bacteria which can help them to move.