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Why doesn't a long lasting vaccine against common cold exist yet?
Viruses that show a high mutation rate like the virus that causes the common cold escape simply from the action of vaccines against them. After a primary immune response (natural or artificially induced) against the virus in the next season of infection latest mutant resistant strains appear and the protection get with the immune response of the last season is lost. (One could say that the high mutation rate is a produce of "immunization" found by these viruses.)
Explain some Guidelines to Help in Use Drugs Wisely? By now, you are aware that the interaction of foods and drugs is a complex problem. Researchers cannot always predict wheth
Classifying Organisms You have now seen that the binomial nomenclature gives each species a unique and unambiguous name. It is necessary lo group species into genera and gener
When air humidity is high does the plant transpiration increase or lower? When air humidity is high transpiration diminishes. As transpiration is a simple diffusion process it
What is karyotype? The name karyotype is given to the set of chromosomes of an individual, generally when visualized and identified under the microscope. The visualization usua
To study if bacteria grow better where it is warm or cold Again inoculate two sterile dishes. Label one 'warm' and the other 'cold'. Place the 1st dish in a dark warm place an
i have question that all scientist agree that the basic unit off life is a cell and scientist said this to be a cell theory... and they also said that if a theory survive continuou
What are allosteric enzymes? Allosteric regulators can be allosteric inhibitors or allosteric activators. The interaction among an allosteric enzyme and the allosteric inhibito
Q. Show the History of animal taxonomy? The beginning of animal taxonomy was made by Aristotle (384-322 B.C.). He extensively studied about anatomy, embryology, habit and ecolo
different type of respiration in animals
Cytoplasmic Matrix ( = cytosol or Hyaloplasm ) This is the actual protoplasmic part of the cytoplasm, containing dissolved proteins, electrolytes, glucose, etc. And forming
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