Qualification > Sciences
Edexcel BIOLOGY Doubts!!!!
maryam96:
Thanks
Joshan9:
I am an private candidate and im writing my A levels in may but im completely and totally lost when it comes to the practical paper. I have no idea how to even begin to answer them questions and i dont even have a teacher for any help im studying biology on my own. I dont know anything about the t test or u test or the chi thing, i keep seeing people talk about them on the forums but wth are they?!?! can someone pleaseeee explain the tests to me in brief or give me some notess pleaseeee and thank youu:)
DrThamooth:
i got this from somewhere here in this website
if u keep searching u'll find many files that are very useful
this is a summary for the As practicals fr paper 3B
its very useful
go through each one then go do past papers based on it
good luck :D
maryam96:
Please can someone help me, why do we cover the explant using a cling film in a tissue culture experiment? Thank you so much!
NotAbod:
To prevent contamination by bacteria. For this experiment you grow ex-plants on agar which contains nutrients suitable for bacterial growth.
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