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Q. What is the virus that causes flu? Why doesn't the body produce permanent immunity against that virus? How does the vaccine against flu work?
Flu is a disease caused through the influenza virus, a highly mutant DNA virus, Due to the high mutation rate of the virus that forms many different strains flu always presents epidemic features in affected populations and people may have several flu episodes during life (the immune response made from previous infections is not proficient in future infections).
The injection against flu is a vaccine made of attenuated virus of three different strains. Each year the World Health Organization (WHO) researches and determines which the strains that should compose the vaccine are. This is a approach to face the high mutation rate of the virus.
Q. From the zygote, pluricellular organisms are formed by serial mitosis. Would this formation be possible if each cell made by mitosis had an identical life in relation to its ant
Enzyme Proteins that act as catalysts, speeding the rate at which biochemical reactions proceed but not altering the direction or nature of the reactions.
BASICS OF ENVIRONMENT We live in two world one is natural world of animals, plants, air, water and soil that was present since the evolution of earth. The other world is of soc
Making individual rock collections Peoples should be encouraged to make their own collection of rocks. Small pasteboard or cigar boxes will serve to be the collections. The spe
Floating Stage - Hydrarch The pond is now colonised by plant species which are rooted in mud but their leaves reach water surface and float. These are species of Nelumbo, Nymp
Q. What is the function of the plant cell wall? The plant cell wall has protective and structural functions. It plays an significant role in the constraint of the cell size, pr
What are the excretory organs in protozoa.
Ultrasonography: Ultrasounds are sound waves with a frequency of higher than the upper range of human hearing i.e., approximately 20,000 cycles per second (20 kilohertz).
What role would a cell coat play if it was a part of a city?
what is the classification of the Gumbout Chiton?
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