Explanation

• Blood groups are identified by specific antigens present on the surface of red blood cells.
• These antigens determine compatibility for blood transfusions.
• They are key to classifying blood types like A, B, AB, and O.

Last verified on 04-09-2026

Explanation

• First Polio Vaccine Introduced: 1955
• Developer: Dr. Jonas Salk
• Type: Inactivated Polio Vaccine (IPV)
• Oral Polio Vaccine (OPV): 1961
• Developer of OPV: Dr. Albert Sabin

Last verified on 20-07-2026

Explanation

• The Banyan tree is famous for developing aerial roots from its branches.
• These roots grow downward and may become supporting trunks.
• Because of its multiple root-like structures.

Last verified on 04-09-2026

Explanation

• The stomach produces Hydrochloric Acid (HCl) as part of gastric juice.
• HCl creates a highly acidic environment with a pH of about 1.5–3.5.
• It activates pepsinogen into pepsin.
• Pepsin helps break down proteins into smaller peptides.

Last verified on 03-09-2026

Explanation

• The normal number of ribs in a human body is 24 (12 pairs).

Additional information:

• Upper ribs: True ribs (1–7 pairs)
• Lower ribs: False ribs (8–12 pairs)
• Floating ribs: Last 2 pairs (11–12)

Last verified on 24-06-2026