Science Facts Set-22

• Ultra-microscopic bacteria are the bacteria that are smaller than normal bacteria. They have a size of about 0.2 to 0.3 microns. Their sizes are comparable to some large viruses.
• Electromagnetic waves do not require any material medium for propagation.
• Dilute ethanoic acid is called vinegar and it is used as a preservative.
• Sulphur melts at 115 degrees centigrade to form a pale yellow liquid.
• Mutation is a sudden heritable change that occurs in an organism.

• Bronchitis is a disease which is characterized by the inflammation of bronchi and bronchioles.
• Blood is also called 'the river of life' because it plays a vital role of transportation in our body.
• The average life span of a male lion is only ten years.
• Abscisic Acid (ABA) is a growth inhibitor produced by mature leaves of plants.
• The Andromeda Galaxy is approaching the Sun with a velocity of about 100 to 140 km/s.