$A$ flowering plant is planted in an earthen pot and irrigated. Urea is added to make the plant grow faster,but after some time the plant dies. This may be due to $..........$

$A$ perfect partition between an osmotically active system and pure water in physical conditions can be formed by a

When a cell shrinks, what is this process known as?

When a potato piece is kept in a highly concentrated salt solution,then

How is water absorbed by the roots?

If the external solution is less concentrated than the cytoplasm,it is called $P$. If the external solution is more concentrated than the cytoplasm,it is called $Q$. If the external solution balances the osmotic pressure of the cytoplasm,it is called $R$.