Q3 of 56 Page 1

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

Depletion of ozone layer will cause harmful radiations to fall directly on Earth’s surface and leading to skin cancer in the living organisms of the ecosystem.


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1

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

 2

State one function of pupil in human eye.

 4

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

 5

The formula of magnesium oxide is MgO. State the formula of barium nitrate and barium sulphate, if barium belongs to the same group as magnesium.