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Q. What are the environmental harms caused by mercury pollution? What are the main sources of mercury pollution?
The Mercury is a metal that when present in the water of rivers, seas and lakes contaminates fishes, crustaceans, molluscs and other living beings. The mercury accrues along the food chain and in each following trophic level the amount of the metal within the individuals is higher and when humans eat contaminated animals they also become contaminated and severe nervous system injuries may emerge. The major sources of mercury pollution are gold mining and the use of derived substances in agriculture and industry.
Q. What is the constitution of the cartilaginous matrix? The cartilaginous matrix is made of generally collagen type II, collagen fibers, and of proteoglycans, proteins associa
Crustacea The Crustacea show a great morphological diversity of appendages which may be grouped into three categories, cephalic, thoracic and abdominal. Their appendages are c
What is osteoblast The osteoblast is the key for the development of new bone. It is essential that a large number of osteoblasts accumulate on the implant surface(contact osteo
Is it possible that an X chromosome of a woman can have come from her father? It is not only possible that an X chromosome of a woman is from her father, it is certain. Every w
Valvular Heart Diseases Normal heart valves function to maintain a uni-directional flow of blood through cardiac chambers. Two basic problems that compromise the normal functi
Cosmid: The type of artificially constructed vector taken in use for cloning the 35-45 kb of DNA. These are plasmids carrying the phage l cos site (which permits packaging into l
In this section, we shall discuss a classic example of natulal selection in action. In the preceding unit, it was stated that natural selection always aims at eliminating alleles,
Zymogens, or proenzymes, are enzymes secreted in inactive form. Under certain conditions, a zymogen shifts to the active form of the enzyme. Zymogen secretions in general occur due
What happens to a cell when placed in a salt solution and then into distilled water?
What is respiration
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