The living component of the cell was termed by $Dujardin$ as:

Protoplasm was regarded as the "physical basis of life" by

Which is the largest cell in the animal kingdom?

The electron microscope was invented by ..........

Which of the following microscopes is useful for studying a living cell directly without staining?

Arrange the following cells in an ascending order of their size and select the correct option:
$I.$ Ostrich eggs
$II.$ Mycoplasma
$III.$ Bacteria
$IV.$ Human $RBCs$