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It is defined as the presence of chemicals and particulate in the atmosphere in quantities and pollution that are harmful to human health and environment. It occurs when the concentration of certain substances become high enough to cause the atmospheric environment to become toxic. Air pollution affects the human being very high because every human being inhales about 15-22 kg of air daily and if it polluted it will damage human health considerably.
Example: SO2, CO, Chlorofluoro-Carbon (CFC'S), Nitrogen oxide etc.
Q. After passing the epididymides through which structures do sperm cells go until exteriorization? After leaving the epididymis in the testicle sperm cells enters the vas defe
Explain the Decolourizing Agent - Ziehl-Neelsen Method? Acid alcohol - a mixture of 95% ethanol and 3% HCI - is used for decolourization. Before decolourization, smear is allow
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
BRONCHOSCOPY: Bronchoscopy is the passage of lighted bronchoscope into the bronchial tree. Bronchoscopy may be performed with rigid steel of flexible fiberoptic instruments.
a) Name two food additives needed to keep food wholesome, and say what they do. b) Name two food additives (or types of additive) which are not necessary for keeping fo
What is the cell division process directly related to the embryonic growth? The embryonic growth depends directly on mitosis. By this type of cell division the zygote separates
What is the name of the DNA duplication process? What is the main enzyme that participates in it? The process of copying, or duplication, of the DNA molecule is called replica
explain the modes of nurition in animals
In this 1st step, the corresponding aminoacyl-tRNA for the second codon binds to the A site by codon-anticodon interaction. Binding of the aminoacyl-tRNA needs elon
S n ake bite Biting by a poisonous snake is manifested by clinical findings of local swelling and nervous symptoms. E t iology: The poisonous snakes have different typ
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