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...accounted for over 80% of the UK’s oil consumption and 40% of the UK’s final energy use. Liquid fuels produced from oil made up 97% of the final transport energy demand. Electricity made up less than 1%. [Described image] Figure 1: UK primary and final energy use, 2018 The UK produces oil but its oil reserves have been falling. Peak UK oil production was in 1999 and...

...account, explain how natural selection could have caused an increase in beak size in this population of ground finches. The adult survivors of the drought were the ones with the largest beaks because they could still crack large seeds. These birds then mated and because beak size is heritable and is passed on to offspring, the chicks from these birds inherited large beak...

...accounts for about 21% of the Earth’s atmosphere so the partial pressure of O2 (PO2) in the atmosphere is 0.21 × 760 mmHg = 160 mmHg. CO2 is present only in trace amounts, so the partial pressure of CO2 (PCO2) in the atmosphere is roughly 0.3 mmHg. Question 4 Nitrogen Nitrogen (N2) comprises 78% of the Earth’s atmosphere. What is the partial pressure of nitrogen...