Ilya Mechnikov, a scientist from the Kharkiv region, shared the Nobel Prize in Physiology or Medicine in 1908 for work on what?

Answer and explanation

Correct answer: D. Immunity

  1. Step 1: Mechnikov worked on cells that protect the body. Step 2. He studied phagocytes and immunity and shared the prize with Paul Ehrlich. Answer: Immunity. Why not the others: DNA and penicillin were discovered in later decades, and blood circulation was described earlier.

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