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EDEXCEL B A LEVEL BIOLOGY PAPER 3 GENERAL MARK SCHEME ANSWERS
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EDEXCEL B A LEVEL BIOLOGY PAPER 3 GENERAL MARK SCHEME ANSWERS aseptic techniques to transfer bacterial cells growing on an agar gel plate to a tube containing a sterile broth - ANS--disinfect surfaces -work near bunsen flame -flame top of tube -heat wire loop -open lid of petri dish to small extent -allow wire loop to cool locust dissection - ANS-1. pin the locust 2. cut body open 3. submerge under water a student investigated the effect of different gases on the breathing rate of a lo...
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