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Prelims 2019 paper

UPSC CSE Prelims 2019 · Question 21 · Agriculture & crops

Which one of the following groups of plants was domesticated in the 'New World' and introduced…

Prelims 2019 · Q21

Agriculture & crops Easy

Which one of the following groups of plants was domesticated in the 'New World' and introduced into the 'Old World'?

Answer & explanation

Answer: (a) Tobacco, cocoa and rubber

The 'New World' is the Americas; the 'Old World' is Asia, Africa and Europe. Tobacco, cacao (cocoa) and Para rubber are all American plants that Europeans carried across the Atlantic after 1492. Every other option contains at least one Old World crop.

  • ✓ (a) Tobacco was used by Native Americans before Europeans adopted it; cacao is native to the Amazon and Orinoco basins; the rubber tree (Hevea brasiliensis) is native to the Amazon basin and was later planted in Asia.
  • ✗ (b) Cotton was domesticated independently in South Asia as well — traces are found at Harappan sites — so it is not solely a New World gift.
  • ✗ (c) Coffee comes from Ethiopia and sugarcane from South and Southeast Asia, both Old World crops.
  • ✗ (d) Wheat was domesticated in West Asia, and coffee in Africa; only rubber here is American.

Remember · Columbian Exchange, Americas → Old World: tobacco, cocoa, rubber, maize, potato, tomato, chilli, groundnut, pineapple, papaya. Old World → Americas: wheat, sugarcane, coffee.

📘 Read it in NCERT: Class 11 Themes in World History, Ch 6 (practise this chapter) · Class 10 India and the Contemporary World – II, Ch 3 (practise this chapter) · Class 12 Themes in Indian History, Part I, Ch 1 (practise this chapter) · Class 11 Themes in World History, Ch 1 (practise this chapter)

Sources

Question and answer: UPSC's official GS Paper I (2019, Series A) — paper ↗ · answer key ↗. Explanation: Minimalist IAS, checked 30 Sept 2026 (how we verify). ·

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