Tissue Respiration Gas Exchange and Breathing MCQs App | IGCSE O Level Biology MCQs e-Book PDF | 136
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IGCSE O Level Biology MCQs – Mock Test 136

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The "Tissue Respiration Gas Exchange & Breathing MCQs" App Download (iOS & Android): Respiration is a/an; MCQ with answers: mechanical process, chemical process, oxidation process, and electrical process. Practice Respiration in Biology Questions and Answers, Google e-Book to download free chapter for biology remote participation.

Tissue Respiration Gas Exchange & Breathing MCQs PDF Download – Mock Test 136

MCQ 676: Respiration is a/an:

  1. chemical process
  2. mechanical process
  3. electrical process
  4. oxidation process

MCQ 677: In ecosystem, Biomass is the:

  1. total mass of living matter at each trophic level
  2. total mass of living things in a biosphere
  3. total number of living organisms in a given area
  4. total energy transferred to each trophic level

MCQ 678: Thick, muscular and elastic walls are characteristics of:

  1. endothelium
  2. arteries
  3. veins
  4. capillaries

MCQ 679: For excretion, animals with impermeable skin use:

  1. simple diffusion process
  2. produce concentration gradient
  3. special excretory glands
  4. special excretory organs

MCQ 680: Mycelia is formed through thread like structures called as:

  1. cilia
  2. hypha
  3. hydra
  4. flagella

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