Question

Majority of cells cannot be seen directly with our naked eyes because:

• A. organisms are generally unicellular
• B. cells are microscopic
• C. cells are present only inside the body
• D. cells are grouped into tissues

Answer 1

The correct option is B

cells are microscopic

The correct option is B.

Explanation of the correct option:

1. The majority of the cells cannot be seen directly with our naked eyes because cells are extremely small.
2. The smallest cell seen under the microscope is Mycoplasma (PPLO-Pleuro pneumonia-like organisms).

Explanation of the incorrect option:

Option A:

1. Organisms are generally having two types of cells: unicellular & multicellular.
2. Unicellular means organisms are made up of only one cell while multicellular organisms mean made up of more than one cell.

Option C:

1. Cells are the basic unit of life.
2. Hence, cells are present inside the body of living organisms.

Option D:

1. Cells are grouped together to form tissue forming tissue-level organisms in the body.
2. Similar cells combine together to form the tissue.
3. Eg: coelenterates and ctenophores.

Final answer: The majority of cells cannot be seen directly with our naked eyes because cells are microscopic.