IGCSE O Level Biology Certification MCQs – Practice Test 3 (Chapter 7)

Effects of Human Activity on Ecosystem Quiz with Answers PDF – Download Test 3

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The "Effects of Human Activity on Ecosystem Quiz" App Download (iOS & Android): Non-toxic, unreactive chemicals used as cooling agents in refrigerators are known as; MCQ with answers: chloroflourocarbides, chloroflouro bicarbonates, chloroflourocarbonates, and chlorofluorocarbon. Study Structure of Cell & Protoplasm: Biology Quiz Questions, download Google Book (Free Chapter) for biology learning enhancement.

Effects of Human Activity on Ecosystem Quiz PDF Download – Practice Test 3

MCQ 11: Problem of solid waste disposal can be reduced through:

recycling
lesser pollution
more timber
population control

MCQ 12: Non-toxic, unreactive chemicals used as cooling agents in refrigerators are known as:

chloroflouro bicarbonates
chloroflourocarbides
chloroflourocarbonates
chlorofluorocarbon

MCQ 13: Lives of organisms in ecosystem become threatened due to:

urbanization
industrialization
introduction of toxics in ecosystem
rapid housing

MCQ 14: If a substance accumulates in a body for a long time, it will be:

passed out through egestion
passed out through excretion
become insoluble in water
passed on to next consumer in food chain

MCQ 15: Most fertile layer of soil is:

top layer
organic layer
middle layer
lower layer

IGCSE O Level Biology Quiz App & e-Book – Effects of Human Activity on Ecosystem Certification Guide

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