Question

Anyone with a pair of healthy kidneys can donate one kidney because

• A. kidney is not vital organ
• B. humans can survive with one kidney
• C. kidney is vestigial organ
• D. both b and c

Answer 1

The correct option is B humans can survive with one kidney

Human excretory system comprises a pair of kidneys, pair of ureters, urinary bladder and urethra. Single kidney is sufficient for excretory purposes. The other kidney is present as backup (in case one kidney fails). Hence anyone with a healthy kidney can donate one and survive with a single kidney.
Kidney is a vital organ because it helps in removing harmful wastes from the body.
Vestigial organs are organs which have lost their functionality during the evolution. These organs were functional in ancestors. Examples for vestigial organs are coccyx, wisdom teeth etc. Kidney is not vestigial in humans.