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Author Question: Clothing or equipment that prevents the wearer from direct contact with hazardous chemicals or ... (Read 21 times) |
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.
The term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.
Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.