IGCSE O Level Biology MCQs - Chapter 7

Effects of Human Activity on Ecosystem Multiple Choice Questions (MCQs) PDF Download - 9

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Effects of Human Activity on Ecosystem MCQs with Answers PDF Download: MCQ Quiz 9

MCQ: 41

Miscarriages in women may be due to intake of

carbon dioxide
polluted water
water containing dioxins
DDT

MCQ: 42

Nitrates (NO₃^-1) and phosphates (PO₄^-3) reach underground water with

acid rains
fertilizers washed away by rain water
decomposition of organic compounds by anaerobic bacteria
decomposition of organic compounds by aerobic bacteria

MCQ: 43

Central heating systems can be run through

more deforestation
burning of garbage
lesser incinerators
cooling water pipelines

MCQ: 44

Loss of control of hand and feet occurs due to

lead poisoning (Pb)
sulfur dioxide (SO₂)
nitrogen oxide (NO)
carbon dioxide (CO₂)

MCQ: 45

Metals is produced as waste in industries like

skiing
mining
electroplating
digging

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Effects of Human Activity on Ecosystem MCQs

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