Question # 1

Which fo the following are mostly woody trees, always perennials and never herbs of annuals?

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Angiosperms

Gymnosperms

Pteridophytes

Bryophytes

Who invented bifocal lenses?

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Thomas Jefferson

Benjamin Franklin

Romans

Sumerians

If the radius of Earth were to shrink buy one per cent , its mass remaining the same, the acceleration due to gravity on Earth's surface would

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Increase

Decrease

remain unchanged

None of theses

Which is the smallest gland in human body

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Liver

Thyroid

Pituitary

Salivary Glands

What is the smallest unit of life?

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Cell

Atom

Virus

a & b

Which highly contagious infection begins with mild, cold liker symptoms, then produces severe, uncontrollable coughing fits

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Legionnaire

Diphtheria

Whooping cough

Tuberculosis

Which one of he following gives energy to our body?

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Vitamins

Water

Carbohydrates

Proteins

What type of EM radiation gives people tens?

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Gamma

Infrared

Ultraviolet

Visible

Who discovered that the atoms f some naturally-occurring element s were not exactly alike in 1919:

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F.W. Aston

Nells Bohr

Albert Einstein

Dalton

The focal length of a convex lens is

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Shorter for blue light than for red

The same for all colours

Shorter of red light than for blue

Maximum for yellow light

Which of the followings tell us how many protons an atom has?

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Mass

Weight

Atomic number

charge

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