IGCSE O Level Biology Competitive Exam MCQs – Practice Test 13 (Chapter 6)

Ecology: O level Biology MCQs with Answers PDF Download – Test 13

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Ecology O level Biology MCQs with Answers PDF Download: MCQ Quiz 13

MCQ 61: Coal, natural gas and oil are forms of:

fossil fuels only
carbon compounds only
nitrogen compounds
fossil fuels and carbon compounds

MCQ 62: In plants, seed formation occurs when the:

flowering season starts
environment is suitable for growth
unfavorable season approaches
fruit turns lumpy

MCQ 63: Due to salt concentrations, aquatic animals are confronted with:

feeding problems
breathing problems
excretory problems
osmotic problems

MCQ 64: For most types of fresh water organisms, best water has a:

pH above 8
pH below 8
pH almost 7
pH below 7

MCQ 65: Fall in temperature may result in a:

death
increase in metabolic activities to produce heat
decrease in metabolic activities of animals
decrease the production of heat

Ecology: O level Biology MCQs App & e-Book – IGCSE O Level Biology Competitive Exam

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