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Alevel Biology OCR > Biology maths > Flashcards

Biology maths Flashcards

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1
Q

circumference of circle =

A

2𝜋r

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2
Q

area of circle =

A

𝜋r^2

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3
Q

percentage change =

A

new quantity - original quantity
________________________ x100
original quantity

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4
Q

percentage yield =

A

actual amount
_______________ x100
theoretical amount

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5
Q

percentage error =

A

number of readings x absolute uncertainty
_________________________________ x100
quantity measured

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6
Q

magnification =

A

size of image
___________
actual size

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7
Q

Rf =

A

distance moved by solute
_____________________
distance moved by solvent

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8
Q

rate =

A

change in quantity
_______________
time

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9
Q

surface area to volume ratio =

A

surface area
__________
volume

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10
Q

proportion of polymorphic gene loci =

A

number of polymorphic gene loci
__________________________
total number of loci

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11
Q

cardiac output =

A

heart rate x stroke volume

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12
Q

RQ =

A

CO2 produced
____________
O2 consumed

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13
Q

microorganism population growth

N =

A

N0 x 2^n

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14
Q

efficiency of biomass transfers =

A

biomass transferred
________________ x100
biomass intake

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15
Q

Q10 =

A

rate 2
_____
rate 1

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16
Q

What is Spearman’s rank used for?

A

to determine the correlation between two sets of data (similarities and differences between them)
-1 = -ve correlation
0 = no correlation
1 = +ve correlation

17
Q

What is standard deviation used for?

A

to look at the spread of data around the mean

-the larger the value, the more different the values are to the mean

18
Q

What is t-test used for?

A

to determine the significance of the difference between two means

19
Q

What is chi-squared used for?

A

to compare observed and expected results

20
Q

Which statistical test should be used to determine correlation between two sets of data?

A

Spearman’s rank

21
Q

Which statistical test should be used to look at the spread of data around the mean?

A

standard deviation

22
Q

Which statistical test should be used to determine the significance of the difference between two means?

A

t-test

23
Q

Which statistical test should be used to compare observed and expected results?

A

chi-squared

Alevel Biology OCR (26 decks)

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