Penicillin was invented by:

• Christian Bernard
• Alexander Fleming
• Mc Collum
• William Harvey

In 1643, an Italian named Evangelista Torricelli invented:

• Thermometer
• Barometer
• Ritcher Scale
• Bar Codes

Generally, non-metals do not conduct electricity. Which of the following conducts electricity?

• Diamond
• Graphite
• Sulfur
• Fullerene

Most plants absorb nitrogen in the form of:

• proteins
• nitrates and nitrites
• urea
• nitrates, nitrites and urea

Oxygen liberated during photosynthesis comes from:

• water
• carbon dioxide
• glucose
• Both carbon dioxide and glucose.

Which quantity remains constant in parallel connection of resistance?

• Electric current flow rate
• Potential difference
• Amount of electricity
• Both the potential difference and amount of electricity

Under critical temperature, on compressing gases turn to liquid, because:

• molecules are of finite size.
• molecules have random motion.
• molecules have inter-molecular forces.
• molecules are spherical.

Number of spinal nerves in human are:

• 11 pairs
• 27 pairs
• 32 pairs
• 31 pairs

Which pigment gives pale yellow color to urine?

• Erithromycin
• Amoxylin
• Urochronie
• Unicom

Which is the respiratory organ of fish?

• Ears
• Gills
• Skin
• Lungs