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Q. What are some human diseases caused by virus and what are their respective modes of transmission?
The major viral diseases transmitted by respiratory secretions (cough, sneezes) and by saliva drops are flu, mumps, smallpox (variola, already considered eradicated), rubella, measles, SARS. Major viral diseases transmitted through blood or sexual contacts are AIDS, hepatitis B, HPV, hepatitis C, ebola hemorrhagic fever. Major viral diseases transmitted by animal dengue fever, vectors are rabies, yellow fever. Few viral diseases transmitted by fecal-oral route, including contaminated food, are hepatitis A, poliomyelitis (disease almost eradicated in many parts of the world).
When toxic substances enter lakes, streams, rivers, oceans and other water bodies, they get dissolved or lie suspended in water. This causes pollution of water bodies, which degrad
Define Ziehl-Neelsen Staining Technique? Ziehl-Neelsen staining is used for staining these bacteria. The technique was discovered first by Robert Koch during his pioneering inv
Blood Plasma - Circulation Centrifugation of blood results in its separation into two portions - a packed mass of cells which constitute around 45 per cent of the volume of t
Metamorphosis in Amphibians Metamorphosis is radical in anurans, slight or not exists in urodeles. In anuran amphibians like toads and most frogs, metamorphosis is generally
Subphylum Sarcodiha Pseudopodia typically present; flagella present in developmental stages of some species; free living or parasitic. Superclass - Rhizopoda Loc
Different Feeding Habits Feeding habits of animals depend on the nature of the food consumed. Herbivorous : When plants are eaten. Examples - Horse, cow, rabbit, apes.
EFFECT ON BODY - 1 . CANCER - Benzpyrene present in tobacco is carcinogenic , responsible for lung cancer. Tobacoo chewing also produce oral cancer. Smoking m
What is the difference between osmosis and diffusion? Osmosis is the occurrence of movement of solvent particles (in general, water) from a region of lower solute concentration
What is photoperiod? Photoperiod is the daily time period of light exposure of a living being. The photoperiod might be vary according to the period of the year.
Explain the Feeding process for Preschoolers? The word preschool children, you may be aware, is used for children less than six years of age. After the first year, there is a s
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