Name the plastid which stores starch,oils and protein granules.

If cells of onion peel and $RBC$ are separately kept in a hypotonic solution,what among the following will take place? Explain the reason for your answer.
$(a)$ Both the cells will swell.
$(b)$ $RBC$ will burst easily while cells of onion peel will resist the bursting to some extent.
$(c)$ Both $(a)$ and $(b)$ are correct.
$(d)$ $RBC$ and onion peel cells will behave similarly.

What are the consequences of the following conditions?
$(a)$ $A$ cell containing higher water concentration than the surrounding medium.
$(b)$ $A$ cell having lower water concentration than the surrounding medium.
$(c)$ $A$ cell having equal water concentration to its surrounding medium.

The cell organelle involved in forming complex sugars from simple sugars is:

When do chromatin fibres organize themselves into chromosomes?

Organelle other than nucleus,containing $DNA$ is