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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.
Explain the Presumptive Test - Most Probable Number Test? The Presumptive test is used to detect and estimate coliform population of a water sample. This test is carried out by
How auxins act helping the lateral (secondary) growth of the stem? The Auxins stimulate the formation of conductive vessels, phloem and xylem, promoting the thickening of the s
1. Andalusian chickens may be either black, white, or gray. The gene for black is not dominant over the gene for white, nor is the gene for white dominant over the gene for black.
Q. What will happen without enough insulin? Without enough insulin two things can happen. Firstly, the cells of the body will be unable to use the glucose in the blood for ener
Ammonification Many heterotrophic bacteria actinomycetes and fungi in soil and water metabolise the organic nitrogen and release it in an inorganic form as ammonia. This proce
1. Briefly explain the dynamics in enzyme reaction mechanism with potential energy surface diagram. 2. How to find the rate constant of any enzymetic reaction? 3. Derivation
S e l e n i u m Selenium toxicity due to pollution of environment has been reported in animals. Contamination of pasture from industries emitting fly ash particularly fo
Endosperm - Pollen Biology The examination of live material of j. montana reveals that the division of the primary endosperm nucleus is transverse, followed by the laying down
Assessment On observation of a child with this type of anaemia you will find that in addition to the symptoms of iron deficiency anaemia there is hyper-pigmentation over knu
Q. What are the functions of pantothenic and biotin acid for the body? How are these vitamins obtained? Biotin also known as vitamin B8 is a vitamin that acts in the metabolism
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