IGCSE O Level Biology MCQs - Chapter 7

Effects of Human Activity on Ecosystem MCQ (Multiple Choice Questions) PDF - 22

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

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

A) greenhouse effect

B) smog formation

C) sun getting closer to the Earth every year

D) moon moving away causing more tidal activities

MCQ 107: Use of fossil fuels causes

A) pollution

B) conservation of resources

C) global warming

D) infections

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

A) insoluble in water

B) soluble in water

C) sparingly soluble in water

D) aspiringly insoluble in water

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

A) carbon dioxide

B) lead

C) zinc

D) nitrogen oxide

MCQ 110: Risks of flood increases if

A) more smog occurs

B) more tress are planted

C) soil erosion is prevented

D) greenhouse effect increases

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