*1386899856*
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra space use
the lined pages at the end of this booklet. The question numbers must be clearly shown.
• Answer all the questions.
INFORMATION
• The total mark for this paper is 60.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• Spelling, punctuation and grammar (SPaG) and the use of specialist terminology will be
assessed in questions marked with a pencil ().
• This document has 12 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2025 [601/8310/X] DC (DE/JG) 343265/4
OCR is an exempt Charity
Turn over
, 2
Ecosystems of the Planet
1
(a) Look at Fig. 1 in the Resource Booklet.
(i) Name the hot desert which covers the largest area on Fig. 1.
........................................................................................................................................
............. [1]
(ii) Describe the distribution of hot deserts shown on Fig. 1.
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(iii) State two climate features associated with hot desert ecosystems.
1 .....................................................................................................................................
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2 .....................................................................................................................................
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(iv) Describe how animals adapt to live in a hot desert ecosystem.
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© OCR 2025
, 3
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............. [2] Look at Fig. 2 in the Resource Booklet.
(b) Explain how the nutrient cycle operates in a coral reef ecosystem.
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© OCR 2025 Turn over
, 4
CASE STUDY
Threats to tropical rainforest biodiversity
Tropical rainforest
studied: ...............................................................................................................
(c)* Explain how threats to biodiversity affect interdependence in a tropical rainforest.
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© OCR 2025
INSTRUCTIONS
• Use black ink. You can use an HB pencil, but only for graphs and diagrams.
• Write your answer to each question in the space provided. If you need extra space use
the lined pages at the end of this booklet. The question numbers must be clearly shown.
• Answer all the questions.
INFORMATION
• The total mark for this paper is 60.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• Spelling, punctuation and grammar (SPaG) and the use of specialist terminology will be
assessed in questions marked with a pencil ().
• This document has 12 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2025 [601/8310/X] DC (DE/JG) 343265/4
OCR is an exempt Charity
Turn over
, 2
Ecosystems of the Planet
1
(a) Look at Fig. 1 in the Resource Booklet.
(i) Name the hot desert which covers the largest area on Fig. 1.
........................................................................................................................................
............. [1]
(ii) Describe the distribution of hot deserts shown on Fig. 1.
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
............. [3]
(iii) State two climate features associated with hot desert ecosystems.
1 .....................................................................................................................................
..................
........................................................................................................................................
..................
2 .....................................................................................................................................
..................
........................................................................................................................................
..................
(iv) Describe how animals adapt to live in a hot desert ecosystem.
........................................................................................................................................
..................
© OCR 2025
, 3
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
............. [2] Look at Fig. 2 in the Resource Booklet.
(b) Explain how the nutrient cycle operates in a coral reef ecosystem.
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
............. [4]
© OCR 2025 Turn over
, 4
CASE STUDY
Threats to tropical rainforest biodiversity
Tropical rainforest
studied: ...............................................................................................................
(c)* Explain how threats to biodiversity affect interdependence in a tropical rainforest.
........................................................................................................................................
..................
........................................................................................................................................
..................
........................................................................................................................................
..................
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..................
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© OCR 2025
