Name two kinds of cycles of materials.

Hasan buys two kinds of cloth materials for school uniforms, shirt material that costs him Rs 50 per metre and trouser material that costs him Rs 90 per metre. For every 3 meters of the shirt material he buys 2 metres of the trouser material. He sells the materials at 12% and 10% profit respectively. His total sale is Rs 36,600. How much trouser material did he buy?

Name two kinds of angiospermic plants.

Name two major kinds of ecosystems.

Name three kinds of muscle fibres.

Name the kind of change of state whennaphthalene changes into gaseous state.

What are the two kinds of hormones on the basis of their mode of action?

Name three kinds of mutagens.

Name three kinds of simple tissue.

What are two kinds of complex tissue?