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MCQ practice · SSC Biology Board questions · Chapter 12: Heredity in Organisms and Biological Evolution

Dhaka Board 2022

The main causes of the origin of life on Earth are-

  1. i. sea water
  2. ii. nucleoprotein
  3. iii. methane, ammonia and so on

Think it through first, then pick an option.

  1. a i and ii
  2. b ii and iii
  3. c i and iii
  4. d i, ii and iii
Answer and explanation

Correct answer: d i, ii and iii

Sea water, nucleoprotein and the methane and ammonia mixture were all part of the chain that led to life.

Why the other options are wrong

  • a i and ii: i and ii are right; methane, ammonia and so on (iii) is right too.
  • b ii and iii: ii and iii are right; sea water (i) is right too.
  • c i and iii: i and iii are right; nucleoprotein (ii) is right too.