Biotechnology deals with techniques of using live micro-organisms, plant or animal cells or their components or enzymes from organisms to produce products and processes (services) useful to human beings. The term biotechnology was coined in 1917 by a Hungarian Engineer, Karl Ereky to describe a process for large scale production of pigs. Gene manipulation is a fast emerging science. It [...]
Here are your useful notes on Genus Chara! There are about 90 species in this genus. Occurrence: The species of Chara grow submerged attached to the muddy bottom of the pools and ponds of clear water. They prefer less oxygenated and hard water. The species of Chara are not found in the waters where mosquito larvae are present. They form [...]
There are six orders in Xanthophyceae classes, i.e.: 1. Heterococcales and 2. Rhizochlo- ridales, 3. Heterocapsales, 4. Heterotrichales, 5. Heterococcales and 6. Heterosiphonales. 1. Heterochioridales (i) The plant body is flagellated, naked and unicellular. Image Curtsey: http://www.wfdireland.ie/docs/5_FreshwaterPearlMusselPlans/Background%20Documents/(ii) Each cell contains two or more discoid or band-shaped chromatophores and one or more contractile vacuoles in the protoplast. (iii) Reproduction takes place [...]
