2025 AQA GCSE BIOLOGY Higher Tier Paper 2H Question Paper
& Mark Scheme (Merged) June 2025 [VERIFIED]
IB/G/Jun25/G4006/E9 8461/2H
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Answer all questions in the spaces provided. box
0 1 Ichthyosaurs are reptiles that lived in the sea millions of years ago.
Figure 1 shows the fossilised remains of an ichthyosaur.
Figure 1
0 1 . 1 Suggest how the fossil in Figure 1 was formed after the ichthyosaur died.
[2 marks]
0 1 . 2 The length of the image of the ichthyosaur in Figure 1 is 120 mm.
The real length of the ichthyosaur was 17 times longer than the image in Figure 1.
Calculate the real length of the ichthyosaur.
Give your answer in metres.
[3 marks]
Real length of ichthyosaur = metres
IB/G/Jun25/8461/2H
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0 1 . Table 1 gives the classification of the ichthyosaur in Figure 1.
Table 1
Classification group Name
Kingdom Animalia
Chordata
Class Reptilia
Order Ichthyosauria
Ichthyosauridae
Genus Ichthyosaurus
Species intermedius
Complete Table 1.
Choose answers from the box. [2 marks]
0 1 . 4 Ichthyosaurs were predators.
Ichthyosaurs are now extinct.
Scientists think that extinction of the ichthyosaurs was caused by increased
competition with other predators for food.
Suggest two other possible causes of extinction of the ichthyosaurs.
[2 marks]
IB/G/Jun25/8461/2H
, 4
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outside the
3
1
2
9
0 2 Students investigated how many daisy plants were growing in a field at different distances from a
tree.
This is the method used.
1. Place a 20-metre tape measure on the ground, with the tree at 0 metres.
2. Place a 1 m2 quadrat on the ground every 4 metres along the tape measure.
3. Count the number of daisy plants in each quadrat.
4. Take a soil sample from each quadrat to find the percentage of water in the soil.
Figure 2 shows the tree and the tape measure.
Figure 2
This is the method used for finding the percentage of water in each soil sample
(step 4):
5. Weigh an empty container.
IB/G/Jun25/8461/2H
& Mark Scheme (Merged) June 2025 [VERIFIED]
IB/G/Jun25/G4006/E9 8461/2H
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 Ichthyosaurs are reptiles that lived in the sea millions of years ago.
Figure 1 shows the fossilised remains of an ichthyosaur.
Figure 1
0 1 . 1 Suggest how the fossil in Figure 1 was formed after the ichthyosaur died.
[2 marks]
0 1 . 2 The length of the image of the ichthyosaur in Figure 1 is 120 mm.
The real length of the ichthyosaur was 17 times longer than the image in Figure 1.
Calculate the real length of the ichthyosaur.
Give your answer in metres.
[3 marks]
Real length of ichthyosaur = metres
IB/G/Jun25/8461/2H
, 3
Do not write
outside the
box
0 1 . Table 1 gives the classification of the ichthyosaur in Figure 1.
Table 1
Classification group Name
Kingdom Animalia
Chordata
Class Reptilia
Order Ichthyosauria
Ichthyosauridae
Genus Ichthyosaurus
Species intermedius
Complete Table 1.
Choose answers from the box. [2 marks]
0 1 . 4 Ichthyosaurs were predators.
Ichthyosaurs are now extinct.
Scientists think that extinction of the ichthyosaurs was caused by increased
competition with other predators for food.
Suggest two other possible causes of extinction of the ichthyosaurs.
[2 marks]
IB/G/Jun25/8461/2H
, 4
Do not write
outside the
3
1
2
9
0 2 Students investigated how many daisy plants were growing in a field at different distances from a
tree.
This is the method used.
1. Place a 20-metre tape measure on the ground, with the tree at 0 metres.
2. Place a 1 m2 quadrat on the ground every 4 metres along the tape measure.
3. Count the number of daisy plants in each quadrat.
4. Take a soil sample from each quadrat to find the percentage of water in the soil.
Figure 2 shows the tree and the tape measure.
Figure 2
This is the method used for finding the percentage of water in each soil sample
(step 4):
5. Weigh an empty container.
IB/G/Jun25/8461/2H
