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In the last unit we traced the human evolutionary history mostly from a palaeontological viewpoint. Although still fragmentary, the available fossil evidence makes it possible to construct a more or less coherent story of human origin and its development. Besides suggesting a primate ancestory, fossil evidence has indicated various trends in human evolution. Today the modern man is regarded as a climax of the evolutionary process. But several questions are raised as to which direction the human evolution is proceeding now and what direction will it take in the future. Is the be-all and end-all of all the evolutionary process? Or do human beings continue to evolve biologically? It may not be possible to provide a direct answer to these questions since evolution is a long term process and the effects could be visualised only after tens of thousands of years.
What are the main features of the meristematic cells? Why do these cells require to have a high mitotic rate? Meristematic cells have very thin cell walls, small vacuoles, a w
Biological Conduits : Freeze dried arterial, bovine MA, human umbilical vein, cryo preserved umbilical vein or artery and omniflow sheep collagen tube grafts also have poor
Define the Primary Stain and Mordant? (i) Primary Stain - Crystal violet is the primary or first stain, which stains all the cells violet/purple. (ii) Mordant - Gram's iodin
Are hormones only proteins? Some hormones are proteins, such as insulin, glucagon and ADH, others are derived from proteins (changed amino acids), like adrenaline and noradrena
At the beginning of the process in an animal cell, the partition of the centriole takes place, which has been duplicated during Interphase but were in the same centrosome. Bipol
HISTORY OF THE CELL Term "Cytology" was given by Hertwig , he also wrote a book on " Cell and Tissue ". Father of cytology = Robert Hooke. Father of Modern cytology
A detail note on cryptophyes
Branemark's Theory of Osseointegration In 1952, Swedish orthopedic surgeon, Branemark, conducted microscopic studies done in situ of the bone marrow in rabbit's fibula with in
Determine the architecture of cell There are over 200 types of cells in the human body, which are assembled into a variety of tissues, such as, the epithelia, connective tissue
Prevention of endocardial infection by the use of antimicrobial agents, although desirable, is not always possible. By identifying the patients at risk, the causative bacteria and
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