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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.
Casparian strip In plants, the impermeable waxy layer between the cells of endodermis which stops water and solutes from entering into the xylem, except by passing through the cyt
Examples of cloning and molecular biology cloning may produce heterozygous individuals (as mother was heterozygous) and suggests a way to get pure breeding cats molecu
What is meant by the arch reflex? In some situations the movement of the skeletal striated muscles does not depend upon commands of the superior motor neurons, i.e., it is not
Explain Sound production - Ethological Approach in Taxonomy The most used, ethological feature in identification is the sound produced by various species of animals. This is
Mechanical requirements of implant materials Dental implant s must be able to sustain and transfer loads -It should have adequate mechanical strength in order to distribute th
A cell in G1 of interphase has 12 chromosomes. How many chromosomes and DNA molecules will be found per cell when this original cell progresses to the G2?
Q What is the kind of digestive system of echinoderms? Echinoderms present a complete digestive system with anus and mouth. Q. Do sea urchins have teeth? Sea urchins ha
Respiratory Protection - Azotobacter In respiratory protection N 2 -fixing cells adjust the rate of .aerobic respiration according to prevailing oxygen tension i.e. rising and
Illustrate the term Cilia? A cellular hairlike locomotory structure which comprises an extension of the plasma membrane surrounding a 9+2 organization of microtubules. Unlike f
in humans, maleness of is determined by a pair of sex chromosomes called X and Y. (a)what is the genotype for males? (b)what is the genotype for females?
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