A contraceptive comparison gives typical-use pregnancies per 100 users in one year: method A, a daily hormonal pill, 8; method B, an implant, 1. Neither method protects against sexually transmitted infections.
.1
Calculate the difference in expected pregnancies between 500 users of A and 500 users of B for one year.
[2 marks]
.2
A person often forgets daily medication and also wants infection protection. Evaluate these methods for that person.
[2 marks]
4 marksFoundation and Higher4.7.2.2 How materials are cycled4.2.3.2 Plant organ system
AQA Trilogy 8464
Spec and skills
Paper scope: B2
Spec 4.7.2.2
Spec 4.2.3.2
Original practice question
Answer and supported method checks
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.
Four plants all have genotype RR at one tested gene, but their final heights are 14, 19, 24 and 27 cm. The plants grew with different supplies of water. A student claims that these results show height cannot be inherited.
.1
Explain why the student’s conclusion is not justified.
[3 marks]
.2
Suggest how to test the effect of water while reducing genetic differences between plants.
[2 marks]
6 marksFoundation and Higher4.7.3.3 Land use4.7.3.1 Biodiversity
AQA Trilogy 8464
Spec and skills
Paper scope: B2
Spec 4.7.3.3
Spec 4.7.3.1
Original practice question
Answer and supported method checks
A council can build homes on unused industrial land or on a meadow. The industrial site costs more to clean, while the meadow contains many wildflower and insect species.
Evaluate the two sites in terms of human needs and biodiversity.
[6 marks]
6 marksHigher4.6.3.4 Resistant bacteria
AQA Trilogy 8464
Spec and skills
Paper scope: B2
Spec 4.6.3.4
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.
