Question

The majority of the 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

Of all recognized organisms, the cell is the fundamental structural, functional, and biological unit. The simplest form of life is a cell.

Complete answer:
First we should know about cells to answer this question. In1665, Robert Hooke found cells, naming them because of their similarity to cells in a monastery occupied by Christian monks. The "building blocks of life" are also called cells. Cell biology, cell biology, or cytology was considered the science of cells.
Now, let us find the solution from the options-
- Naked eyes do not study the cells clearly. They need sophisticated instruments. The microscopes aid in the examination of cells. Thus, option A is not the correct option.
The molecular examination of the cells is carried out with the assistance of an electron microscope.- With our unaided eye, the rest of the cells cannot be directly seen because cells have very narrow eyes that are outside the view of the human eye. Microscopes are made up of a lens mixture that forms a magnified image.
- The diameter of a normal animal cell is 10-20 μm, around one-fifth of the size of the smallest particle apparent to the naked eye. Thus, option C is not the correct option.
- Not only are cells small, they are colourless and transparent as well. Consequently, the detection of their major internal characteristics relied on the production of a variety of stains in the latter part of the nineteenth century that offered ample contrast to make certain characteristics noticeable. Thus, option D is not the correct option.

Hence, the correct answer is option (B)

Note: In general, it is not feasible to use a given type of radiation to probe structural information any shorter than its own wavelength. This is a simple weakness of all microscopes. Therefore the absolute restriction to the resolution of a light microscope is defined by the visible light wavelength.