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Does anyone happen to have old Biology AS past papers? By old, I mean 90's and maybe 80's if possible. Anyone? /:
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watching through a eye piece graticule won't give any paralox error.Hello everyone,
I would like to know if anyone have any tips on doing biology practicals, specifically how to use the stage micrometer.
Any other advice would be nice too.
Thank you.
Beca
just type on wikipedia whichever slide image you wanna see..By microscope i mean, images of slides with labels highlighting tissues. and wet practical - tips
sure but is this an as level question?plzz help me .......what are DNA probes??
Yes. But their function is to help align the chromosomes on the metaphase plate which is during Metaphase I and so you'd have to describe that in Metaphase I. This is what the mark-scheme means, I guess.http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Biology (9700)/9700_w10_ms_41.pdf
q.9 asks for the behaviour of chromosomes during meiosis.
crossing ovr and chaismata formation occurs at prophase 1, ryt????????/?
http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Biology (9700)/9700_w10_ms_41.pdf
q.9 asks for the behaviour of chromosomes during meiosis.
crossing ovr and chaismata formation occurs at prophase 1, ryt????????/?
and what are the calculations behind serial dilution? just wanted to make sure
so it means we'll describe abt crossing over in metaphase nt prophase1?????Early prophase 1...........and this chiasmata formation continues in metaphase I.......In anaphase 1 no chaismata mata formation............................ one good tip for you when bivalents are formed....chaismata formation occurs........so crossing over of genetic information occurs between non-sister chromatids.
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