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Explain briefly about the selenium Toxicity?
There is a narrow margin between the beneficial and harmful intakes of selenium. The level at which selenosis occurs is not well-defined but threshold for toxicity appears to be 850-900 μg per day. Symptoms of chronic toxicity include brittle hair and nails, skin lesions with secondary infections and garlic odour in the breath. Chronic selenium poisoning in people is characterized primarily by loss of hair and changes in finger nail morphology. In some cases, skin lesions may occur.
Theor y of Epigenesis (i) It was proposed by C.F. Wolff & supported by Von Baer. (ii) Wolff proposed that germ cells contain definite but undifferentiated
The response produced when an allergen is injected into an individual, who is sensitive is known as P-K reaction.
Compared to platyhelminthes which physiological problem have the cylindrical body of nematodes brought? How was that problem solved? The cylindrical shape of nematodes made imp
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What is the difference between an ecological niche and a habitat? An ecological niche is a set of peculiar activities, resources and methods that a species explores to survive
are there non-parasitic viruses
We are told that every surface we touch is teeming with bacterial cells, and bacteria are found in the pools we swim in, the water we wash with, and on the hands of friends. Why ar
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Explain the Disadvantage of Contact Plate Method? These plates are suitable for sampling the surfaces having low contamination, like pre-cleaned and sanitized surfaces. This is
Q. What is population growth rate? The Population growth rate (PGR) is the percent variation between the numbers of individuals in a population at two different times. Thus the
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