Q9 of 34 Page 133

Mention the size of an ostrich egg. Is it a single cell of a group of cells?

An ostrich’s egg is 15 centimetres in length and 13 centimetres wide. The weight of this egg is about 1.5 kg and it is single cell which is believed to be the largest existing single cell today.


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7

Write the name of control centre of cell.

 8

Why does a red blood cell not reproduce?

 10

Draw a labelled diagram to show the general structure of a cell.

 11

Plant and animal specimens are usually stained with dyes before observing them. Give reasons and name one dye used of the purpose.