IGCSE O Level Biology MCQs – Practice Test 10 (Chapter 7)

Effects of Human Activity on Ecosystem MCQ with Answers PDF Download – Test 10

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The MCQ: Along the trophic level, in a food chain, the insecticide amount; "Effects of Human Activity on Ecosystem MCQ" App (Android, iOS) with answers: increases at each trophic level, decreases at each trophic level, remains unchanged, and may increase or decrease depending on consumption to study e-learning courses. Practice GCE Biology Quiz Questions, download Apple Book (Free Chapter) for ACT subject tests.

Effects of Human Activity on Ecosystem MCQ with Answers PDF Download: Quiz 10

MCQ: 46

Along the trophic level, in a food chain, the insecticide amount

decreases at each trophic level
increases at each trophic level
remains unchanged
may increase or decrease depending on consumption

MCQ: 47

Gaseous pollutants include

biological decay
forest fires
volcanic eruptions
all of above

MCQ: 48

No smog occurs if

cool air is allowed to escape
if pollutants like smoke and sulphur dioxide are prevented from escape
if cool air and pollutants are prevented from escape
if pollutants like smoke and sulphur dioxide are escape

MCQ: 49

Ozone depletion can be prevented with

use of scrubbers in factory chimneys
acidic waste is treated with alkalis
fossil fuels are used in factories
lower consumption of chlorofluorocarbons-based products

MCQ: 50

Reaction between oxides of nitrogen (N₂) and oxygen (O₂) results in

formation of nitric acid only
acid rains only
alkali rain
formation of nitric acid and acid rains

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