Question

What did Robert Hooke discover in the thin section of the cork?
A. Cellulose
B. Cell wall
C. Nuclei
D. Protoplasm

Answer 1

Hint: The cell is Known as the unit of structure. There are two types of cells found in nature. These are prokaryotic cells and eukaryotic cells. Prokaryotic cells are those which do not comprise membrane-bound organelles like nuclei, mitochondria, Golgi body, etc. Eukaryotic cells carry a well-developed membrane surrounding organelles. Eukaryotic cells are two types of, named plant cells and animal cells. The cell wall is present in the plant cell but lacks in the animal cells.

Complete answer:
Robert Hooke experimented by using a thin slice of the cork. Cork is a cylindrical structure used in sealing bottles. He became very curious by observing the unique properties of the cork which were floating capability, springy feature, etc. He took a thin slice of a cork and placed it under the light microscope. By using the sunlight and a thick lens Robert Hooke observed honeycomb-like structures that were separated from each other by the thin walls. These structures were empty air-filled chambers. Robert Hooke named these empty chambers the cell or pore. He concluded that due to the presence of air in the structure made the cork floatable and springy.

So the correct answer is option B. The cell wall.

Note: Robert Hooke was a natural philosopher. He was born on 18th July 1635. He was famous for the discovery of cells. In 1665 he first noticed the hollow structure in the thin slice of cork. The other discoveries are the law of elasticity, fossilization nature, and its involvement in the biological sciences.