Q2 of 56 Page 1

State one function of pupil in human eye.

Iris controls the amount of light entering the eye by changing the size of pupil.


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36

When boilers of water are used for a very long time, then white layers get deposited on inside of these boilers? How can these white layers be removed?

 1

Write the name and formula of the first member of the carbon compounds having functional group-COOH.

 3

State one harmful effect of depletion of ozone layer on the living organisms of the ecosystem.

 4

"DNA copies generated during reproduction will be similar but may not be identical to the original." Justify the statement.