explain Cell theory and Modern cell
Answers
Credit for developing cell theory is usually given to two scientists: Theodor Schwann and Matthias Jakob Schleiden.
While Rudolf Virchow contributed to the theory, he is not as credited for his attributions toward it. In 1839, Schleiden suggested that every structural part of a plant was made up of cells or the result of cells. He also suggested that cells were made by a crystallization process either within other cells or from the outside. However, this was not an original idea of Schleiden. He claimed this theory as his own, though Barthelemy Dumortierhad stated it years before him. This crystallization process is no longer accepted with modern cell theory.
In 1839, Theodor Schwann states that along with plants, animals are composed of cells or the product of cells in their structures.[15]
This was a major advancement in the field of biology since little was known about animal structure up to this point compared to plants. From these conclusions about plants and animals, two of the three tenets of cell theory were postulated.[10]
1. All living organisms are composed of one or more cells
2. The cell is the most basic unit of life
Schleiden's theory of free cell formation through crystallization was refuted in the 1850s by Robert Remak, Rudolf Virchow, and Albert Kolliker. In 1855, Rudolf Virchow added the third tenet to cell theory. In Latin, this tenet states Omnis cellula e cellula. This translated to:
3. All cells arise only from pre-existing cells
However, the idea that all cells come from pre-existing cells had in fact already been proposed by Robert Remak; it has been suggested that Virchow plagiarized Remak and did not give him credit. Remak published observations in 1852 on cell division, claiming Schleiden and Schawnn were incorrect about generation schemes. He instead said that binary fission, which was first introduced by Dumortier, was how reproduction of new animal cells were made. Once this tenet was added, the classical cell theory was complete.
Modern interpretation
The generally accepted parts of modern cell theory include:
All known living things are made up of one or more cells
All living cells arise from pre-existing cells by division.
The cell is the fundamental unit of structure and function in all living organisms.
The activity of an organism depends on the total activity of independent cells.[citation needed]
Energy flow (metabolism and biochemistry) occurs within cells.
Cells contain DNA which is found specifically in the chromosome and RNA found in the cell nucleus and cytoplasm. All cells are basically the same in chemical composition in organisms of similar species.
Modern version
The modern version of the cell theory includes the ideas that:
Energy flow occurs within cells.
Heredity information (DNA) is passed on from cell to cell.
All cells have the same basic chemical composition.
Answer:
call theory >
In biology, cell theory is the historic scientific theory, now universally accepted, that living organisms are made up of cells, that they are the basic .,
modern cell >
Modern cell theory states that: The bodies of all living beings are made up of cells and their products. Cells are units of structure in the body of living organisms. ... All new cells contain the same amount and degree of genetic information as contained in the parent cell.
Explanation:
think its helpful .