In 1868, T. H. Huxley described protoplasm as the “physical basis of life”. Protoplasm is a clear, colorless and jelly-like substance which seemed to make up the contents of the cell. It was also described as “substance of life” or “living material”. Continue reading What is the physical basis of life?
The concept that the cell is the basic unit of life is known as Cell Theory. It is one of the most fundamental generalizations of biology and ranks with Charles Darwin’s theory of organic evolution and T.H. Morgan’s theory of the gene of modern biology. Continue reading What is Cell Theory?
Cellular Totipotency is the ability of a single cell to produce all cell types and to organise them into an entire organism when cultured in a suitable culture medium at appropriate temperature and aeration conditions. Spores and Zygote are examples of totipotent cells. Continue reading What is meant by Cellular Totipotency?