IGCSE O Level Biology MCQs – Practice Test 22 (Chapter 7)

Effects of Human Activity on Ecosystem MCQ with Answers PDF Download – Test 22

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Effects of Human Activity on Ecosystem MCQ with Answers PDF Download: Quiz 22

MCQ 106: Increased melting of ice glaciers may be a result of:

greenhouse effect
smog formation
sun getting closer to the Earth every year
moon moving away causing more tidal activities

MCQ 107: Use of fossil fuels causes:

pollution
conservation of resources
global warming
infections

MCQ 108: DDT (dichloro-diphenyl-trichloroethane: C₁₄H₉Cl₅) is:

insoluble in water
soluble in water
sparingly soluble in water
aspiringly insoluble in water

MCQ 109: Harmful substances introduced in the air includes all, but:

carbon dioxide
lead
zinc
nitrogen oxide

MCQ 110: Risks of flood increases if:

more smog occurs
more tress are planted
soil erosion is prevented
greenhouse effect increases

Effects of Human Activity on Ecosystem MCQ App & e-Book – IGCSE O Level Biology Entrance Exam

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