When viewing a specimen through a light microscope, scientists use to distinguish the individual components of cells.
a beam of electrons
radioactive isotopes
special stains
high temperatures

When viewing a specimen through a light microscope, scientists use special stains to distinguish the individual components of cells.

Explanation:

Microscope cell staining -

Microscope cell staining is a method that is used to for the better visualization of the cells and the parts of the cell , when are studied under microscope .

Stains are basically a type of biological tissues .

By the use of different type of stains , a nucleus of the cell or the cell wall of the cell are viewed easily , cells are sometimes stained in order to highlight metabolic process and can be used to find the difference between a dead or a live cell .

Some type of stains are specific for living cells , but some stains can work both for living as well as the non living cells .

answer; ///(b) it is composed of four protein chains and four heme groups;

tissue

explanation:

it is actually formed by geoup of cells which is tissue