Ecology: O level Biology Study App | IGCSE O Level Biology MCQs e-Book PDF
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IGCSE O Level Biology Competitive Exam MCQs – Practice Test 21 (Chapter 6)

Ecology: O level Biology MCQs with Answers PDF Download – Test 21

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Ecology O level Biology MCQs with Answers PDF Download: MCQ Quiz 21

MCQ 101: Mosquito eggs hatch out in the larvae in:

  1. 2 days
  2. 4 days
  3. 6 days
  4. 1 week

MCQ 102: A large amount of dilute urine is produced in:

  1. freshwater bony fish
  2. marine bony fish
  3. marine boneless fish
  4. freshwater boneless fish

MCQ 103: PH (power of Hydrogen) of about 8 is characteristic of:

  1. sea water
  2. fresh water
  3. stagnant water
  4. lime water

MCQ 104: Fish can come to the surface of the water for air-breathing in waters of:

  1. low oxygen concentration
  2. high oxygen concentration
  3. low hydrogen concentration
  4. high hydrogen concentration

MCQ 105: Plants capable to survive conditions of extreme drought are:

  1. xerophytes
  2. hydrophytes
  3. cortex
  4. herbaceous

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