After rainfall, water enters soil and is taken up by trees. On a sunny day the air above the woodland contains more water vapour.
.1
Explain how water moves from the soil to the atmosphere through the trees.
[2 marks]
.2
Describe two later processes that return this water to land as part of the cycle.
[2 marks]
4 marksFoundation and Higher
Spec and skills
Original practice question
Answer and supported method checks
A chart shows an XX egg-producing parent and an XY sperm-producing parent. A student says that the egg determines whether the child is XX or XY.
.1
Explain why the student’s statement does not follow the chromosome model.
[2 marks]
.2
Explain why an earlier XY child does not make an XX child more likely next time.
[2 marks]
6 marksHigher
Spec and skills
Original practice question
Answer and supported method checks
A town offers a vaccine against a serious droplet-spread disease. Some residents cannot receive it for medical reasons. A group argues that vaccination is purely an individual choice with no effect on other people.
Evaluate the group's claim using vaccination and transmission.
[6 marks]
4 marksHigher
Spec and skills
Original practice question
Answer and supported method checks
Equal masses of fat are mixed with equal lipase concentrations at 37 °C. A has large droplets at pH 3; B has large droplets at pH 8; C has small droplets at pH 8. This lipase works best near pH 8.
.1
Explain why B should digest fat faster than A.
[2 marks]
.2
Explain why C should be faster than B and relate this to bile.
[2 marks]
6 marksHigher
Spec and skills
Original practice question
Answer and supported method checks
A hospital reduces unnecessary antibiotic prescriptions and improves hand hygiene. A report says that only developing new antibiotics can limit resistant infections.
Evaluate the report’s claim using natural selection and transmission.
