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Explain Differential Media - Culture Media?
It allows differentiation among morphologically and biochemically related group of organisms. It contains certain ingredients which are changed because of microbial metabolism and this change can be seen in form of change in opacity of agar, change in pH or change in colour of media or colonies. Example: Blood agar, mannitol salt agar.
Q. Engler and Prantl's System of Classification? Adolf Engler, Professor of Botany, University of Berlin, Germany, proposed a phylogenetic system of classification in a book en
Three and Four Kingdom Classification The two-kingdom classification, while solving many of the problems of classification, failed to establish clear-cut distinction between p
skin derivates
Chromosomes and Their Organization During division phase , the duplicated chromatin fibres become extremely shortened (= condensed), by coiling and folding ,into short
Theodosius Dobzhansky and Boris Spassky demonstrated the working of normalising selectioion a behavioural trait in two populations of Drosophida pseudobscura. The two populatiors w
The bases in DNA have carbon-nitrogen ring structures; due to the nitrogen atoms they are known as nitrogenous bases. There are two parts of ring structure. Adenine and guanine are
Researchers (Helle et al., 2004) analyzed rates of twin births in the Sami population of Northern Scandinavia during the eighteenth and nineteenth centuries. They found that (1) a
Explain Esterification The process of converting an acid into an alkyl or aryl derivative. Most frequently the process consists of the reaction of an acid with an alcohol in th
Explain Chemistry and Occurrence of phytates? Most plant foodstuffs contain inositol which is present in the form of inyo-inositol hexakisphosphate i.e. phytic acid and its sal
Tissue Level - Level of body organization As you know a tissue is a group of cells similar in origin and structure that perform a specific function. The next level, is the tis
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