what are weeds? how can we control them?

What are the harmful effects of photochemical smog and how can they be controlled?

Which two of the above measures can control the disease ?

15 persons are sitting in a row. In how many ways we can select three of them if adjacent persons are not selected?

If earthworm, insect and snail are kept together, with which single word we can represent them?

How can the gene expression be controlled with the help of RNA

Why should we conserve biodiversity? How can we do it?

Assertion : Electron microscope has more resolving power than optical microscope. Reason : We can control the energy of electron.

Name the world’s most problematic aquatic weed. What in the nature of the water body in which the weeds grow abundantly ?

Assertion: Nucleus controls the metabolic activities of cytoplasm. Reason: Nucleus synthesizes enzymes and send them to cytoplasm to control the activities.

Dwarfness can be controlled by treating the plant with