The proteins and lipids,essential for building the cell membrane,are manufactured by

Name the cell organelles which are without a membrane.

Give differences between diffusion and osmosis.

Why are plastids called the 'kitchens of the cell'?

The statement "Cell arises from pre-existing cells" (Omnis cellula-e cellula) was proposed by:

State the reason for the following:
$(i)$ Mitochondria are known as the powerhouse of the cell.
$(ii)$ Plastids are able to make their own protein.
$(iii)$ Plant cells shrink when kept in a hypertonic solution.