Read this essay to learn about the korper-kappe theory of root apex. The theory was put forward by Schuepp (1917). It is similar to the tunica-corpus theory of the shoot apex. It is based on differences in the planes of cell division. The theory says that the cells in the root apex divide in a pattern called T-divisions. The outer [...]
This article throws light upon the seven main theories of general anaesthesia. The theories are: 1. Lipid Theory 2. Surface Tension Theory (Adsorption Theory) 3. Cell Permeability Theory 4. Neuro Physiological Theory 5. Colloidal Theory 6. Physical Theory 7. Biochemical Theories. 1. Lipid Theory: This theory was advanced by Meyer (1899,1901) and Overton (1901). This theory propose that there is [...]
In this article we will discuss about the chromosome theory of inheritance. In order to understand the role played by chromosomes as carriers of hereditary material, we must turn the clock backward to some landmarks in the history of genetics. The earliest records date back to the work of the 18th Century plant hybridisers. One of them Kolreuter had some [...]