Biology Experimental Skills

A student wishes to study the cell structure under a light microscope having 10X eyepiece and 45X objective. He should illuminate the object by which one of the following colours of light so as to get the best possible resolution ?

1. Yellow
2. Red
3. Blue
4. Green

Best material for the study of mitosis in laboratory is

1. anther
2. root tip
3. leaf tip
4. ovary.