CALLUS CULTURE Callus is amorphous mass of loosely arranged thin walled parenchyma cells developing from proliferating cells the parent tissue. Plants are regenerated by forming a normal shoot, root …
Plant tissue culture broadly refers to the in vitro cultivation of plants, seeds and various parts of the plants (organs, embryos, tissues, single cells, protoplasts). The cultivation process is …
Element Physiological Roles Deficiency symptoms NITROGEN Proteins, chlorophyll, nucleic acids. Cell membranes Enzymes, coenzymes etc. Chlorosis, Leaf fall Stunted growth Poor flowering SULPHUR Amino acids; Methionine, cysteine, Vitamins, biotin, …
A special type of cell division, which reduces the number of chromosomes to half in daughter cells as compared to parent cell. It always occur in diploid cells (2n) …
Mitosis is a type of cell division in which one cell (the mother) divides to produce two new cells (the daughters) that are genetically identical. The mitosis is a …
The X and Y chromosomes are divided into two regions homologous and differential regions. In humans the homologous regions contain DNA sequences that are substantially similar on both …
Genes act by controlling cellular chemistry. Early in the twentieth century, Archibald Garrod, an English physician, made the first observation supporting this insight. Garrod noted that several recessive human diseases …
The world is full of infectious microorganisms, all looking for a suitable host to infect. Bacteria, viruses, and protozoans are constantly attempting to gain entry into our tissues. If …
NEW AND IMPROVED ANIMALS For thousands of years people have improved crop plants and domestic animals by selective breeding, mostly at a trial-and-error level. Woollier sheep and smarter sheep …