Who gave plant cell theory and animal cell theory?
In 1838, German botanist, Matthias Schleiden found that all plant tissues are made up of cells which have been essentially similar structure. German zoologist, Theodor Schwann in 1839 working independently observed that animal cells do not have cell walls but are otherwise similar amongst themselves.
What are the main principles of cell theory?
The three principles of cell theory are: All living organisms are composed of one or more cells. Cell is the basic structural and functional unit of living organisms. All cells arise from pre-existing cells.
What is modern cell theory based on?
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.
What is the cell periphery apparatus?
The Cell Periphery Apparatus, on the other hand, represents vestiges of the actin-based ‘host’ proto-cells which have become specialized for Cell Body protection, shape control, motility and for actin-mediated signalling across the plasma membrane.
What is the significance of compartmentalization in eukaryotic cells?
Compartmentalization in eukaryotic cells is largely about efficiency. Separating the cell into different parts allows for the creation of specific microenvironments within a cell. That way, each organelle can have all the advantages it needs to perform to the best of its ability.
What is plant cell theory?
Cell theory states that the cell is the basic building block of all life forms and that all living things, whether plants or animals, consist of one or more cells. It further states that new cells can only be made from existing ones, and that organisms can grow and reproduce because their cells are able to divide.
Who discovered protoplasm?
Dujardin (1835) – discovered the protoplasm and named as “sarcode”. J.E. Purkinje (1839) – first introduced the term ‘Protoplasm’.