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IGCSE O Level Biology Study Material: Mock Test 42

Causes of Pollution: Biology MCQs (Multiple Choice Questions) PDF Download - 42

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The Causes of Pollution Biology Multiple Choice Questions (MCQ) with Answers PDF (Causes of Pollution Biology MCQs PDF e-Book) download Ch. 7-42 to learn IGCSE O Level Biology Practice Tests. Study Effects of Human Activity on Ecosystem quiz answers PDF, Causes of Pollution Biology Multiple Choice Questions (MCQ Quiz) to learn online school courses. The Causes of Pollution: Biology MCQ App Download: Free IGCSE O Level Biology App to learn causes of pollution: biology, heart: o level biology, circulatory system, size and position of kidneys test prep for best two year degrees.

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Causes of Pollution: Biology MCQ with Answers PDF Download: Quiz 42

MCQ: 206

Lives of organisms in ecosystem become threatened due to

  1. urbanization
  2. industrialization
  3. introduction of toxics in ecosystem
  4. rapid housing
MCQ: 207

Blood in pulmonary arteries is at a lower pressure than blood in aorta allowing

  1. tricuspid valve to shut
  2. bicuspid valve to shut
  3. gaseous exchange to effectively take place in lungs
  4. semi lunar valves to prevent backflow of blood
MCQ: 208

When the heart relaxes,

  1. person respires
  2. peristalsis movements occur
  3. bile is produced
  4. the heart gets filled with blood
MCQ: 209

Vertebral column faces the

  1. concave side of kidneys
  2. convex side of kidneys
  3. posterior side of kidneys
  4. inferior side of the kidney
MCQ: 210

At intervals, along the length, the spinal cord

  1. has myelin sheath
  2. has grey matter
  3. gives off spinal nerves
  4. branches off into dendrites

Causes of Pollution: Biology Study Material: IGCSE O Level Biology App & eBook MCQ

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