1. How can we see minute organisms?
Ans: Use a hand lens.

2. How can we observe organisms that cannot be seen by the naked eye?
Ans: Use a microscope

3. Micro organisms:
Organisms that cannot be seen through naked eyes are called micro
organisms.
Example: Bacteria, Virus, Fungus, Amoeba, Paramecium, Euglena.

4. Cells:
Body is made up of many small units. These small units of body are
called cells.

5. Unicellular Organisms:
There are organisms with only one cell. They are unicellular
organisms.
Example: Amoeba, Paramecium, Euglena.

6. Multicellular Organisms:
There are organisms with more than one cell in their body. They are
multicellular organisms.
Example: Animals, Plants

7. Which are the different types of cells in human body?
Ans: White blood cell, Cheek cell, Muscle cell, Neuron.

8. Cytoplasm:
The matrix filled inside the cell membrane is the Cytoplasm.

9. The covering of the cell is ………..
Ans: Cell membrane

10. The center of the cell is ………..
Ans: Nucleus