1. Examples of unicellular organism – bacteria, amoeba, euglena, paramecium, yeast etc.
2. The viruses are an exception to cell theory.
3. An Ostrich egg is the largest animal cell.
4. Mitosis occurs in somatic cell.
5. Plant cells are bounded by a wall composed of cellulose.
6. Plasma membrane is present in all cells.
7. The largest cell in the human body is the nerve cell.
8. The term ‘cell’ was given by Robert Hook.
9. Cell Theory was first proposed by Schleiden and Schwann.
10. The power house of the cell is mitochondrion.
11. Lysosome is called the ‘digestive’ bag as these are the reservoir of hydrolytic enzymes.
12. Ribosomes are centre of protein synthesis.
13. Xylem conducts water and minerals from roots to aerial parts of the plant.
14. Phloem translocates prepared food (e.g. sucrose) from leaves to storage organs and growing parts of the body.
15. Tendons are cord like, strong, inelastic, structures that joins skeletal muscles to bones.
16. Ligaments are elastic structure which connects bones to bones.
17. The RBC carry oxygen to the tissues for the oxidation of food stuff.
18. Bone consists of Osteocyte cells.
19. Latex of the plant Achrar sapota yields chewing gum.
20. Parkinson’s disease is characterised by the loss of nerve cells in the cerebral cortex.
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