All discovery of cell from 16th to 18th
century
Answers
Answer :
a) During the 17th Century
1) 1665 - Robert Hooke had successfully invented the microscope. Because of this discovery, Robert Hooke was the first one to have a close look of a cell appears to be. His description of these cells was published in Micrographia. However, the cell walls observed by Hooke gave no indication of the nucleus and other organelles found in most living cells.
2) 1674 - A live cell was observed by Anton van Leeuwenhoek, the very first successful effort to do such.
b) During the 18th Century
There were not much discovery in the field of Cell Biology during this time. It took another hundred years after those first cell observations for the ubiquitous nature of cells to be fully recognized.
c) During the 19th Century
1) At the start of the 19th century: It was first thought that animal tissue could be reduced down to individual globules which have the same sizes and shapes. However, this idea was proven otherwise.
2) Francoise Raspail (1825) French scientist Francoise Raspail established one of the concepts of cell theory: that all cells arise from pre-existing cells. The basis of this was the witnessing of binary fission under a microscope wherein a single cell divided into two daughter cells.
3) Theodore Schwann (1836) Theodore Schwann and Matthias Scleiden proposed the cell theory in 1836. The concept of the theory holds that:
(i) The cell is the unit of structure, physiology, and organization in living things.
(ii) The cell retains a dual existence as a distinct entity and a building block in the construction of organisms
(iii) Cells form by free-cell formation, similar to the formation of crystals.
4) Rudolf Virchow (1855) The third doctrine of Schwann and Scleiden was proven wrong by Rudolf Virchow. In this year, he formally enunciated in his powerful dictum that, “Omnis cellula e cellula“, which is translated as “All cells only arise from pre-existing cells“..
5) In the middle of the 19th century, Scientists had accepted the fact that it was simply not possible to view cell structures which measure less than a half of a micrometer with the use of a microscope. But because of the development of the cathode ray tube, they’ve later discovered that aside from using light, electrons can be used to view these structures.
plzzz.... mark as brainliest answer plzzzzz... and follow me.