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My name is Poon Cheng Moh. I have been teaching biology in SMK(P) Raja Zarina, Port Klang for 26 years. I sincerely hope that this blog on SPM Biology will be useful to both teachers and students.

Tuesday, September 20, 2011

Answers to Bioscore Pg 242

3a.carbon dioxide, carbon monoxide, sulphur dioxide, nitric acid/oxides of nitrogen(any 3)

b. i) Acid rain will be formed

ii) The ecological balance of aquatic ecosystem will be disturbed because many types of phytoplankton, zooplankton, fish and other aquatic species will be destroyed.

c i) The agriculture productivity will be reduced. This is because haze prevents sunlight from reaching the earth and lowers the earth’s temperature. The rate of photosynthesis of the plants decreases and affects plants’ growth and crop production.

d. i) Use catalytic converters in cars to clean exhaust emission.

ii) Fix special filters on industry chimneys to filter the release of soot, lead particles and toxic gases into the atmosphere.

iii) Incinerate the garbage

iv) Avoid open burning

v) Control forest fire

vi) Use fuel which releases less smoke (any 3)

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