NEET BIOLOGY

Detailed explanation-1: -Bacteria are the smallest micro-organisms, ranging from between 0.0001 mm and 0.001 mm in size. Phytoplankton and protozoa range from about 0.001 mm to about 0.25 mm. The naked eye can see only the largest phytoplankton and protozoa. Most can only be seen under a microscope.

Detailed explanation-2: -A cell is the smallest unit of life. Most cells are so small that they cannot be viewed with the naked eye. Therefore, scientists must use microscopes to study cells. Electron microscopes provide higher magnification, higher resolution, and more detail than light microscopes.

Detailed explanation-3: -The microorganisms cannot be seen with naked eyes because they are very small in size. Some of these, such as fungus growing on bread, can be seen with a magnifying glass. Others cannot be seen without the help of a microscope. That is why these are called microorganisms or microbes.

Detailed explanation-4: -You can see some cells with your naked eye, such as an unfertilisedostrich egg which is a single cell and a example of microscopic cell is nerve cell.