JSIERT

Ten lakhs = 10,00,000 Million = 1,000,000 106

The single-celled organisms are called unicellular (uni : one; cellular : cell) organisms. A single-celled organismperforms all the necessary functions that multicellular organisms perform.

Organisms made of more than one cell are called multicellular (multi : many; cellular : cell) organisms.

Ostritch egg

Hen egg is single cell.

Cork is a part of the bark of a tree. He took thin slices of cork and observed them under a microscope.

Robert Hooke in 1665 observed slices of cork under a simple magnifying device.

Cell is the structural and functional unit of life .