Science Facts Set-19

• RNA (Ribo Nucleic Acid) is a genetic material in many viruses.
• Lions are the second largest living cats after tigers.
• Antonie van Leeuwenhoek was the first person to observe bacteria under microscope.
• Vitamin B (Riboflavin) is obtained from yeast.
• Hippopotamuses are the third largest mammals in the world.

• Rhombic sulphur, prismatic sulphur and monoclinic sulphur are the three allotropes of sulphur.
• Aluminium is a light metal with a density of 2.7 g/cc.
• Insulin is a hormone which decreases blood sugar level while glucagon is a hormone which increases blood sugar level.
• The moon revolves around the Earth with a speed of 1.022 km/s.
• The average weight of an adult human brain is about 1300-1400 grams.