worked solutions
model answers
, Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
H
GCSE
BIOLOGY
Higher Tier Paper 2H
Monday 9 June 2025 Morning Time allowed: 1 hour 45 minutes
Materials
For Examiner’s Use
For this paper you must have:
• a ruler Question Mark
• a scientific calculator. 1
2
Instructions
• Use black ink or black ball-point pen. 3
• Pencil should only be used for drawing. 4
• Fill in the boxes at the top of this page.
5
• Answer all questions in the spaces provided.
• If you need extra space for your answer(s), use the lined pages at the end of 6
this book. Write the question number against your answer(s). 7
• Do all rough work in this book. Cross through any work you do not want 8
to be marked.
9
• In all calculations, show clearly how you work out your answer.
TOTAL
Information
• The maximum mark for this paper is 100.
• The marks for questions are shown in brackets.
• You are expected to use a calculator where appropriate.
• You are reminded of the need for good English and clear presentation
in your answers.
*jun2584612H01*
8461/2H
for more: tyrionpapers.com
IB/G/Jun25/G4006/E9
, 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
*02* for more: tyrionpapers.com
IB/G/Jun25/8461/2H
, 3
Do not write
outside the
0 1 . 3 Table 1 gives the classification of the ichthyosaur in Figure 1. box
Table 1
Classification group Name
Kingdom Animalia
Chordata
Class Reptilia
Order Ichthyosauria
Ichthyosauridae
Genus Ichthyosaurus
Species intermedius
Complete Table 1.
[2 marks]
Choose answers from the box.
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]
1
2
9
Turn over ►
*03* for more: tyrionpapers.com
IB/G/Jun25/8461/2H
model answers
, Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
H
GCSE
BIOLOGY
Higher Tier Paper 2H
Monday 9 June 2025 Morning Time allowed: 1 hour 45 minutes
Materials
For Examiner’s Use
For this paper you must have:
• a ruler Question Mark
• a scientific calculator. 1
2
Instructions
• Use black ink or black ball-point pen. 3
• Pencil should only be used for drawing. 4
• Fill in the boxes at the top of this page.
5
• Answer all questions in the spaces provided.
• If you need extra space for your answer(s), use the lined pages at the end of 6
this book. Write the question number against your answer(s). 7
• Do all rough work in this book. Cross through any work you do not want 8
to be marked.
9
• In all calculations, show clearly how you work out your answer.
TOTAL
Information
• The maximum mark for this paper is 100.
• The marks for questions are shown in brackets.
• You are expected to use a calculator where appropriate.
• You are reminded of the need for good English and clear presentation
in your answers.
*jun2584612H01*
8461/2H
for more: tyrionpapers.com
IB/G/Jun25/G4006/E9
, 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
*02* for more: tyrionpapers.com
IB/G/Jun25/8461/2H
, 3
Do not write
outside the
0 1 . 3 Table 1 gives the classification of the ichthyosaur in Figure 1. box
Table 1
Classification group Name
Kingdom Animalia
Chordata
Class Reptilia
Order Ichthyosauria
Ichthyosauridae
Genus Ichthyosaurus
Species intermedius
Complete Table 1.
[2 marks]
Choose answers from the box.
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]
1
2
9
Turn over ►
*03* for more: tyrionpapers.com
IB/G/Jun25/8461/2H
