NEET BIOLOGY

Detailed explanation-1: -With a few exceptions, individual cells cannot be seen with the naked eye, so scientists must instead use microscopes (micro-= “small”; -scope = “to look at”) to study them. A microscope is an instrument that magnifies objects otherwise too small to be seen, producing an image in which the object appears larger.

Detailed explanation-2: -Because most cells are too small to be seen by the naked eye, the study of cells has depended heavily on the use of microscopes.

Detailed explanation-3: -This makes the dissecting microscope good for viewing objects that are larger than a few cells but too small to see in detail with the human eye. The compound microscope is typically used for observing objects at the cellular level.

Detailed explanation-4: -Cells are so little, so they can maximize their ratio of surface area to volume. Smaller cells have a higher ratio which allow more molecules and ions move across the cell membrane per unit of cytoplasmic volume. Cells are so small because they need to be able to get the nutrients in and the waste out quickly.

Detailed explanation-5: -Place the glass slide onto the stage. Be careful pushing it under the clips that the cover slide doesn’t move or crack. Turn the coarse focus knob slowly until you are able to see the cells. Turn the fine focus knob slowly until the cells are in focus and you can see them clearly.