Discovery of Cell
Discovery of Cell
Robert Hooke (1665) while examining a thin slice of cork under the primitive microscope, observed that cork consists of small box like structure resembling honeycomb. He called these boxes 'cells'. The substance called cork comes from the bark of a tree. The use of word "Cell" to describe these units is used till today in biology. Cell is a Latin word for 'a little room'. The ordinary compound microscope of today is a greatly improved design of the original Hooke's microscope.
Antony van Leeuwenhoek(1632 - 1723) was an ordinary public official who ground lenses and made microscope observations as a hobby. He examined pond water in 1674, and observed dozens of protists which he called 'animalcules,' as well as Spirogyra or Green algae.
These discoveries helped us to understand different characteristics of cells. Some of these characteristics are :-
In 1838, Matthias Schleiden , a German Botanist, announced that every plant is made up of a large number of cells and each of these cells performed various life processes. A year later, Theodor Schwann, a German Zoologist, made similar discoveries in animals. These discoveries of two different scientists ultimately got published as Cell Theory in `1839.
Rudolf Virchow in 1858 made an addition to the cell theory by saying that all cells arise from pre - existing cells.
According to Cell Theory :-
Robert Hooke used a microscope to investigate the structure of a thin slice of ___________________________- . | |||
| Right Option : B | |||
| View Explanation | |||
The cells were discovered by ____________________________, English scientist in 1665 . | |||
| Right Option : A | |||
| View Explanation | |||
Cork used by the Robert Hooke was made up of which part of the plant ? | |||
| Right Option : A | |||
| View Explanation | |||
Students / Parents Reviews [20]
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