How can healthy potato plants be obtained from a desired potato variey which is viral infected? Explain.

Which part of the potato plant we eat?

How much copper can be obtained from 100g of copper sulphate ?

How can the pea plant be prevented from self pollination? How is cross pollination carried out?

How can the production of dihydrogen, obtained from 'coal gasification', be increased ?

To obtain virus-free healthy plants from a diseased one by tissue culture technique, which part/ parts of the disease plant will be taken?

From which part of the plant coir and hemp are obtained?

Sketch a graph between frequency of incident radiations and stopping potential for a given photosensitive material. What information can be obtained from the value of the intercept of potential axis? A source of light of frequency of greater than the threshold freuency is placed at a distance of 1 m from the cathode of a photocell? the distnace of hte light sources from the cathode is reduced explain giving reasons, what change will you observe in the Stopping potential.

Vidya got a plant which was affected with a viral disease. Her objective is to raise a disease free plant from this infected plant through tissue culture. Which part of the plant should be selected as the explant?