Science Facts Set-27

• A human cell contains 23 pairs of chromosomes (46 chromosomes).
• The SI unit of electrical resistance is ohm (Ω).
• The density of Sodium is less than that of water. This is why sodium floats in water.
• Proxima Centauri is the nearest star to the Sun.
• Methane is also known as 'marsh gas'.

• Silverfishes are actually wingless insects that belong to the order Thysanura.
• The phenomenon of natural radioactivity was discovered by Henry Becquerel.
• The bile is a fluid secreted by liver in many vertebrates. It helps in the process of digestion of lipids in the small intestine.
• Phylogeny is the science of ancestral history.
• About 350,000 extant species of plants have been identified on Earth.