Question

Which of the following has the smallest diameter - an atom , a bacterium , a plant cell , an animal cell or a human hair ? Explain your answer .​​

Answer 1

Answer:

A Bacterium.

Another small parasitic bacterium is Bdellovibrio, which has a typical Gram- negative cell wall. This Proteobacterium is about 0.25 µm in diameter and about 0.5 µm .

Answer 2

Answer:

an atom has the smallest diameter .Cell is much more bigger than atoms because diameter diameter of an atom is 1 × 10^-10 and diameter of A nucleus of any cell is 2 × 10^-15

An atom is million times smaller than thickest human hair

**Important point***

An human body contain almost 7×10^27 atoms.