Which of the following pairs discovery and discoverer is correct?

1. 1. Television– Baird
   2. Transistor — Shockley
   3. Typerwriter — Sholes
   4. Telephone — Morse

Who discovered the satellites of Jupiter?

1. 1. Galileo
   2. Kepler
   3. Newton
   4. Tayco Brake

John Walker invented _____.

1. 1. Safety match
   2. safety Razor
   3. Safety Pin
   4. Safety Valve

Mercury thermometer was invented by _____.

1. 1. Galileo
   2. Fahrenheit
   3. Newton
   4. Priestly

Radioactivity was discovered by _____.

1. 1. Henry Bequerel
   2. Marie Curie
   3. Newton
   4. Einstein

Which of the following pairs is not correct?

1. 1. Barometer– Torricelli
   2. Telescope — Galileo
   3. Aeroplan — Wright Brothers
   4. Helicopter — Brequet

The theory of inheritance of acquired characters was propounded by _____.

1. 1. Charles Darwin
   2. Gregor Mendel
   3. J.B Lamarck
   4. Weismann

Historically, who amongst the following, recognized in 1727 A.D that sunlight and air are important for the growth of plants?

1. 1. Joseph Priestly
   2. Jan Ingenhousz
   3. Stephen Hales
   4. Lavoiser

Who amongst the following, started in 1850, a scientific approach to determine the role of mineral elements in the healthy growth and development of plants?

1. 1. Arnon and Knop
   2. Sachs and Knop
   3. Sachs and Stout
   4. Arnon and Stout

Who discovered the law of attraction and repulsion between electric charges?

1. 1. Coulomb
   2. Graham Bell
   3. Marconi
   4. Reumer