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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.
Explain the Acid Fast Staining? Acid fast staining is a type of differential staining used for identification of certain bacteria, e.g. Mycobacteria which cannot be stained rea
Lengthening of long bones in humans takes place in a specific area of the bone. This area is known as the: a) Cancellous bone b) Medullary canal c) Periosteum (pron: per-
Define Poverty and ignorance - cause of anaemia is dietary? Low purchasing power of the communities and their consequent inability to meet the nutrient requirements, even after
CONDUCTIO N OF IMPULSE - IN NON-MYELINATED AXONS - The impulse moves along the axon as local effect by altering the permeability of neighbouring Na + channels and af
You are given a hamster that has a very short tail (dominant trait) a) Describe a cross that would allow you to determine the short tailed hamster's genotype b) What are the possib
Define Interferons - Humoral Mechanisms Interferons are soluble proteins secreted naturally when cells become infected by foreign bodies. Infected lymphocytes release interfero
Types of Leukemia Leukaemia may be chronic or acute and is classified into the following categories: i) Acute Lymphocytic Leukaemia (ALL) This is the most comm
What are the parts of Nervous system Nervous system is divided into three main parts: 1) The brain and spinal cord or Central Nervous System (CNS). 2) The nerves or Peri
Which statement is true of the energy levels of electrons in shells? A) All the electrons in an atom have similar amounts of energy. B) Electrons must lose energy to move from the
Structure of human spermatozoon: Nature: Human sperms are minute, microscopic and motile. Structure: Each sperm have an oval shaped head piece, a neck, a middle piece and
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