IGCSE O Level Biology Practice Test 227

Pollution: Sewage as Cause Quiz Questions with Answers PDF Download - 227

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Pollution: Sewage as Cause Quiz with Answers PDF Download: MCQs 227

MCQ 1131:

An excellent habitat for bacterial growth is

chlorofluorocarbons based products
burning of garbage
untreated sewage
all of above

MCQ 1132:

If heat radiated from the Earths surface is retained, the outcome will be

formation of smog
green house effect
van der Walls forces of attraction among smoke particles
all of above

MCQ 1133:

In mammals like cats and foxes, the inner hair layer acts as

guard cells
insulator
performs both guarding and insulating functions
conductor

MCQ 1134:

Trachea divides into two

cilia
bronchus
bronchi
pleura

MCQ 1135:

In grass, the function of filament is to

hold pollens firmly
stay inside the bract
expose anther to wind
hold grass firm in the soil

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