cell no and volume

A body centred cubic lattice is made up of hollow sphere of B. Sphere of solid A are present in hollow sphere of B. Radius of A is half of the radius of B. What is the ratio of total volume of sphere B unoccupied by A in unit cell and volume of unit cell?

A bcc lattice is made up of hollow spheres of B . Spheres of solids A are present in hollow spheres of B . The radius of A is half of the radius of B . The ratio of total volume of spheres of B unoccupied by A in a unit cell and volume of unit cell is A xx (pisqrt(3))/(64) . Find the value of A .

Procaryotic cells have a volume range of

Shape OF cell || Cell volume and cell no || Cell membrane structure

A cell increases in volume if the external medium is

A cell increases in volume if the external medium is