2001 General Studies, all questions

UPSC Prelims 2001 · General Studies

Question 127: Science and Technology

Epiphytes are plants which depend on other plants for

afood
bmechanical support
cshade
dwater

AnswerThe answer is (b).

Epiphytes are plants such as orchids that grow on other plants, usually on tree branches, and use them only for mechanical support. They make their own food by photosynthesis and take moisture from the air and rain, so they are not parasites. Remember the difference: epiphytes use the host only for support, while parasites take food and water from it.

Why each option is right or wrong
  • (a) Epiphytes make their own food by photosynthesis.
  • (b) Right: mechanical support.
  • (c) Shade is not what they take from the host.
  • (d) They take moisture from air and rain, not water from the host.

Explanation: written by UPSC Grade, not by UPSC.

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Source: UPSC, Civil Services (Preliminary) Examination 2001, General Studies. UPSC's own paper isn't online; the words are from a published compilation. The paper on upsc.gov.in.