What is lacking in a virus which makes it dependent on a living cell to multiply?

When do chromatin fibres organize themselves into chromosomes?

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.

State whether the following statement is true or false:
Vacuoles are storage sacs for solid or liquid contents.

State the cell theory. Name the scientists who presented it.

What makes lysosomes such effective digestive bags?