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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. What are the "chiasms" of homologous chromosomes observe in prophase I? Chiasms are intersections of two tracts in the form of X, The chiasms seen in prophase I are chromoso
Spinal nerves: They take their origin from the spinal cord. They are the mixed nerves having both sensory and motor fibres. There are 31 pairs of spinal nerves. The se
sizes in some biological systems glucose
PLACENTA - A common tissue of foetus & mother (uterus) which is physical, physiological & endocrinal connection is known as placenta. FUNCTIO N - To provide nutrients
Q. What is embryonic sac? Which are the cells that form the embryonic sac? What are their ploidies? The embryonic sac is female gametophyte of angiosperms. The embryonic sac
What is the classification of this phylum
Q. What is the binding between two amino acids called? The chemical bond between two amino acids is called a peptide bond.
What is the function of the secretions of the prostate, seminal vesicle and bulbourethral glands in reproduction? These secretions with sperm cells from the testicles form the
What is peri-implantitis? Peri-implantitis as defined by Meffert is the progressive loss of peri-implant bone as well as soft tissue inflammatory changes. Bacterial invasion of
While studying evolution, a student comes across a cladogram that includes clades like amphibia, reptilia, aves, and mammalia. What must be the basal clade?
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