Write a note on primary colours, secondary colours and complementary colours.

Give notes on pigments of colour vision.

The three primary colours used in a colour television are ______.

One die of red colour, one of die white colour and one of blue colour are placed in a bag. One die is selected at random and rolled, its colour and the number on its uppermost face is noted. Describe the sample space.

Assertion: The greater part of secondary xylem is lighter in colour and consists of dead elements with highly lignified walls and is called heartwood. Reason The peripheral region of the secondary xylem is dark brown in colour and is called sapwood.

Why is the urine yellow in colour?

Dominant trait for seed colour in peas