Rences between the mass of an object Q-7 Why is excess use of fertilizers detrimental for environment?
Q-8 What Is a Genetically Modmed Croos (GMCs)? Name any one such crop

Explanation:

answer for Q7

Why is excess use of fertilizers detrimental for environment?

answer

Excess use of fertilizers causes environmental pollution as their residual

and unused amounts

become pollutants for air, water and soil,by causing eutrophication in the water bodies, decreasing the soil quality by killing the soil microflora etc.

Hence, excess use of fertilizers is detrimental to the environment.

Q8

What Is a Genetically Modmed Croos (GMCs)? Name any one such crop

answer

Crop which has been developed by introducing a new gene from any other source, to obtain the desired character, is called as genetically modified (GM) crop. Bt Cotton is an example of GM crop which is made insect resistant by introducing a gene from a bacteria, Bacillus thuringiensis.

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