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What is the virus that causes flu? Why doesn't the body create permanent immunity against that virus? How does the vaccine against flu work?
Flu is a disease caused by the influenza virus, a highly mutant DNA virus. Because of the high mutation rate of the virus, that forms many dissimilar strains, flu always presents epidemic features in affected populations and people may have some flu episodes during life (the immune response made from previous infections is not efficient in future infections).
The vaccine against flu is a vaccine made of attenuated virus of three dissimilar strains. Each year the WHO (World Health Organization) researches and determines which are the strains that should compose the vaccine. This is a method to face the high mutation rate of the virus.
In the ecological study of food interactions, what are the autotrophic beings called? In the Ecology autotrophic beings are called as producers because they synthesize the orga
what is working of heart
Independent assortment has which of the following effects on the inheritance of alleles? a.Alleles on the same chromosome are not always inherited together. b.Alleles on diff
Protein structure is determined solely by a protein amino acid sequence. Should a genetically engineered protein in which the order of all amino acids is reversed therefore have th
the body cavity in roundworms is
Iodine Iodine functions are essential components of the thyroid hormones thyroxine (T 4) and triiodothyronine (T3), which regulate the rate of energy metabolism. Absorbed iodi
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Minerals:- Selenium Food Source Sea food, organ meats, cereals (levels vary depending on soil levels) Nutritional Functional role Essential nutrient: Keshan
Q. What is signifying when it is said that a bacteria is an obligate anaerobe? Obligate anaerobes are those living beings that do not survive in the presence of oxygen. For exa
ADRENA L MEDULLA The adrenal medulla develops from the neuroectoderm of the embryo. Medulla consists of chromaffin cells or phaeochromocytes. These cells are connected wi
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