Arrange the following cells in increasing order of their size.
a. Bacteria
b. Mycoplasma
c. Human red blood cells
d. Egg of an ostrich
Mycoplasmas, the smallest cells, are only 0.3 μm in length while bacteria could be 3 to 5 μm. The largest isolated single cell is the egg of an ostrich. Among multicellular organisms, human red blood cells are about 7.0 μm in diameter.