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Responding to change (a2 only)
Infection and response
Biological molecules
Cell biology
Organisation
Energy transfers (a2 only)
Homeostasis and response
The control of gene expression (a-level only)
Substance exchange
Bioenergetics
Genetic information & variation
Inheritance, variation and evolution
Genetics & ecosystems (a2 only)
Ecology
Cells
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2n revolution and dictatorship: russia, 1917-1953
1l the quest for political stability: germany, 1871-1991
1f industrialisation and the people: britain, c1783-1885
1c the tudors: england, 1485-1603
The fight for female suffrage
The cold war
World war two & the holocaust
2j america: a nation divided, c1845-1877
World war one
Medieval period: 1066 -1509
Britain & the wider world: 1745 -1901
Inter-war germany
2m wars and welfare: britain in transition, 1906-1957
2d religious conflict and the church in england, c1529-c1570
Britain: 1509 -1745
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09/10/2022
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Patio •The ratio shows how much of one thing there. is compared to another. Ratios are normally written in the form a:b the order the ratio is stated in is important. Example questions. • There is 25 rugby players and 13 tennis. players in a classroom. Write that the ratio of rugby players to tennis players. = 25:13 Share £50 in the ratio 4:6 4+6=10 150 1015 £5 x 4 = £20 = 20:30 15x6=130 In 9 Class there is a mixture of a year Boys and girls. They are in the ratio 3:4. If there is is boys in the class. How many girls are there? Boys: girls 3 : 4 : وريات 1)x5 202
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