IGCSE O Level Biology Study App | Ecology: O level Biology MCQs e-Book PDF

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IGCSE O Level Biology Competitive Exam MCQs – Practice Test 13 (Chapter 6)

Ecology: O level Biology MCQs with Answers PDF Download – Test 13

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Learn Ecology O level Biology Multiple Choice Questions (MCQs) with Answers PDF (Ecology O level Biology MCQs PDF e-Book) download Ch. 6-13 to study IGCSE O Level Biology Course. Practice Carbon Cycle and Fossil Fuels MCQs, Ecology O level Biology quiz questions and answers PDF to complete biology activities. Free IGCSE O Level Biology Study App Download: Ecology O level Biology MCQs App to study ecology and environment, learning biology, habitat specialization due to salinity, physical environment: ecology career test to improve scientific accuracy.

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Ecology O level Biology MCQs with Answers PDF Download: MCQ Quiz 13

MCQ 61: Coal, natural gas and oil are forms of:

  1. fossil fuels only
  2. carbon compounds only
  3. nitrogen compounds
  4. fossil fuels and carbon compounds

MCQ 62: In plants, seed formation occurs when the:

  1. flowering season starts
  2. environment is suitable for growth
  3. unfavorable season approaches
  4. fruit turns lumpy

MCQ 63: Due to salt concentrations, aquatic animals are confronted with:

  1. feeding problems
  2. breathing problems
  3. excretory problems
  4. osmotic problems

MCQ 64: For most types of fresh water organisms, best water has a:

  1. pH above 8
  2. pH below 8
  3. pH almost 7
  4. pH below 7

MCQ 65: Fall in temperature may result in a:

  1. death
  2. increase in metabolic activities to produce heat
  3. decrease in metabolic activities of animals
  4. decrease the production of heat

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