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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.

Thursday, February 9, 2012

To investigate the effect of TSA/V ratio on the rate of diffusion of substances.

Students preparing cubes of different sizes
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