A potato plant is infected with a virus. Name and explain a method to obtain virus-free potato plats form it.

Explain mutualism with the help of an example.

List four causes of biodiversity loss.

OR

Name two metals used in a catalytic converter. How do they help in keeping the environment clean?

A few residents in your locality, for business gains, have established small-scale industrial/commercial activities such as pathological labs and fabric dyeing centres without obtaining ‘No objection certificates’ from municipal authorities.

Would you support these activities? Give any three reasons in support of your answer.

Name the two end products of double fertilisation in angiosperms. How are they formed? Write their fate during the development of seed.