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Q. Phylogenetic systems of classification?
As already pointed out 'earlier that in Phylogenetic system, the plants are classified according to their evolutionary relationships. It is very difficult to claim that a phylogenetic system is perfect on the basis of evolutionary affinities due to incomplete fossils records and in such a situation the plants are classified on the basis of available data. The systems of classification by Engler and Prantl (1887-1915), Hutchinson (1926, 1934, 1969 and 1973) and by Takhtajan (1954, 1964, 1973, 1980) are Phylogenetic systems. We shall discuss these systems one by one in details.
How can the binding of two amino acids for the peptide formation be described? A peptide is formed when a carbon from the carboxyl group of one amino acid is linked to the nitr
Haploid Production The higher plants are normally diploid, with two sets of chromosomes in their somatic cells. Their haploids (with one set of chromosomes) arise in nature by
When a ventricQlar septa1 defect (VSD) is present, with no aortic stenosis, the peak velocitgr across the defect reflects the difference in pressure between the right ventricle an
in what part of the human body aschelminthes found?
cassification of mode of nutrition
Define Energy requirements for Underweight? The total calorie intake should be 500 to 1000 Kcal in excess of the daily needs in order to result a gain in weight by half to one
Transmission electron microscopy: Around 1931-32 two German scientists. Knoll and Ruska. Invented transmission electron microscopy, and built the first transmission electron m
Define Metabolic Activity and Cell Constituents? Metabolic activity like amount of acid produced or CO 2 produced is directly proportional to the number of bacteria present, s
Prophase This is the first and longest phase of mitosis .At its beginning all 10 nm segments of chromatids (= chromonemata) of the duplicated chromatin fibres of interph
CONTRO L OF EXCRETION - 1. In brain hypothalamus is osmocentre that controls minerals. 2. Cells of DCT & arterioles combien to form Juxta glomerular node, it se
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