541 : Who is the inventor of Airplane with motor?
Ans : Orville and Wright
542 : Sericulture is?
Ans : Rearing of silk worms.
543 : Who is the inventor of Stethoscope?
Ans : Rene Lainnec & William Stockes
544 : The pH value of human blood is nearly ?
Ans : 7.5.
545 : The Blood Bank (Reservoir of blood) in the body is?
Ans : Spleen
546 : Who is the inventor of Air Conditioning?
Ans : Carrier
547 : World’s first woman computer programmer ?
Ans : Augusta Ada King Ada Lovelace
548 : The loss of elasticity of muscles results in a disease called?
Ans : Parkinson’s disease
549 : Who is the inventor of Bicycle?
Ans : Macmillan
550 : The Vaccine that is administered to prevent tuberculosis is ?
Ans : B.C.G (BacillusCalmetteGuerine) vaccine
551 : Father of Genetherapy?
Ans : Anderson
552 : Organisms which obtain heir food from non-living material in their environment are called ?
Ans : Saprophytes
553 : Who is the inventor of Malaria germs?
Ans : Laveran
554 : Which organ controls reflex actions in human beings?
Ans : The spinal cord
555 : MAN stands for ?
Ans : Metropolitan Area Network
