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Edexcel BIOLOGY Doubts!!!!

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Uchia:
age
size
type (gender)

sasha7amad:
In core practical 8, when u investigate effect of mineral deficiencies on plants, why do you wrap tube with aluminium foil?

sasha7amad:
my biology teacher told me that I always have to draw line of best fit so no curves, is that true?? wake up and answer me guys =(

Uchia:
well it depends according to the question

in the markscheme both the line of  best fit and straight line joining all points are acceptable

but still even sometimes a line of best fit might not be sensible since it doesn't pass across most of the points but still it is acceptable

hissyfit:
Does anyone have a list of what we are supposed to know for the Core Practicals.

Are these correct?

1.Method
2.Control
3.types of organisms used,age,species,sex...
4.repeat experimet,get average(method+why u do it)
5.what u measure+what u do it with
6.variables u are keeping constant
7.Safety precautions
Are the Unit 3B papers any good,for the Unit 1 +2 AS exams?

Thanks +rep

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