plumiHow are organisms in an ecosystem interdependent?: OCR GCSE Combined Science B questions
Every OCR GCSE Combined Science B exam question on B3.3 How are organisms in an ecosystem interdependent?, 2018–2025, with its mark scheme and examiner’s report.
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Q3(a)
The whole paper ↗Q3(b)(i)
The whole paper ↗Q3(b)(ii)
The whole paper ↗Q3(c)(i)
The whole paper ↗Q3(c)(ii)
The whole paper ↗Q3(d)
The whole paper ↗Q5(a)
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Q5(b)
The whole paper ↗Q5(c)
The whole paper ↗Q3(a)
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Q3(b)
The whole paper ↗Q3(c)
The whole paper ↗Q3(d)
The whole paper ↗Q5(a)(i)
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Q5(a)(ii)
The whole paper ↗Q6(a)
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Q6(b)
The whole paper ↗Q6(c)
The whole paper ↗Q6(d)
The whole paper ↗Q9(a)(i)
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All 44 questions on How are organisms in an ecosystem interdependent?, as a list
- June 2024, Biology Paper 1 Foundation, Q3(a) (2 marks): Complete the sentences to describe the levels of organisation in an ecosystem. Put a ring around each correct option. Organisms of the same type living in the s
- June 2024, Biology Paper 1 Foundation, Q3(b)(i) (3 marks): Explain what would happen to the Blackbird population if most of the squirrels died from a disease, using Fig. 3.1. [3]
- June 2024, Biology Paper 1 Foundation, Q3(b)(ii) (1 mark): Food chain and food web diagrams help us understand ecosystems. Suggest one benefit of drawing a food web diagram instead of many different food chain diagrams.
- June 2024, Biology Paper 1 Foundation, Q3(c)(i) (3 marks): Draw lines to connect each letter from the diagram with the correct process. Process Letter Combustion A Decomposition Photosynthesis Respiration D [3]
- June 2024, Biology Paper 1 Foundation, Q3(c)(ii) (2 marks): Carbon is cycled through abiotic and biotic components of an ecosystem. Which components of an ecosystem are abiotic and which are biotic? Tick (v) one box in e
- June 2024, Biology Paper 1 Foundation, Q3(d) (2 marks): Producers use carbon compounds to make fatty acids and amino acids. Complete the sentences to explain what fatty acids and amino acids are then used to make. Us
- June 2023, Biology Paper 1 Foundation, Q5(a) (1 mark): Biomass is passed through this food chain when the organisms eat each other. Where was all of this biomass originally produced? [1]
- June 2023, Biology Paper 1 Foundation, Q5(b) (3 marks): The amount of biomass in the grass is 810 kg / m3. The amount of this biomass passed on to the grasshoppers is 37 kg / m3. Calculate the percentage of the grass
- June 2023, Biology Paper 1 Foundation, Q5(c) (2 marks): Photosynthesis in the grass makes glucose. The grass uses some of this glucose to make amino acids, fatty acids, glycerol, and other sugars. Which statements ab
- June 2023, Biology Paper 5 Higher, Q3(a) (3 marks): Complete the sentences to describe the levels of organisation in this area. Use phrases from the list. a community a population an ecosystem an individual All o
- June 2023, Biology Paper 5 Higher, Q3(b) (2 marks): Complete the table to describe the different parts of this area of the Arctic Ocean. Tick (3) one box in each row. It is a biotic part of It is an abiotic part
- June 2023, Biology Paper 5 Higher, Q3(c) (1 mark): State the name of the substance that the clouds help to cycle through the ecosystem. [1]
- June 2023, Biology Paper 5 Higher, Q3(d) (3 marks): Microorganisms in the sand feed on dead organic matter. They use it for cellular respiration and release carbon dioxide into the ocean water. Explain why releas
- June 2022, Biology Paper 1 Foundation, Q5(a)(i) (1 mark): Complete the table by writing in the masses rounded to the nearest 10 kg. [1]
- June 2022, Biology Paper 1 Foundation, Q5(a)(ii) (2 marks): Calculate how many times more carbon is contained in peatland soil than in woodland soil. Number of times more carbon = times more [2]
- June 2022, Biology Paper 1 Foundation, Q6(a) (6 marks): The diagram shows an incomplete model of the water cycle. Sun Wind Precipitation (rain and snow) Evaporation Rivers and Runoff streams Groundwater Lakes and oce
- June 2022, Biology Paper 1 Foundation, Q6(b) (4 marks): Some of the rain that falls on land evaporates. The table shows how the type of plants growing on the land affects the percentage of rain that evaporates per ye
- June 2022, Biology Paper 1 Foundation, Q6(c) (2 marks): The UK has a target to plant new trees in 300 km2 of land each year to help manage the water cycle. New trees were planted in 150 km2 of land in 2020. Calculate
- June 2022, Biology Paper 1 Foundation, Q6(d) (2 marks): Water and carbon are both cycled through ecosystems. Complete the table to show which parts of an ecosystem each substance is cycled through. Tick (3) one box i
- June 2022, Combined Science Paper 4 Foundation, Q9(a)(i) (1 mark): Which two organisms from the list below are secondary consumers in the food web diagram? Tick (✓) two boxes. Greenfly Hedgehog Lettuce Owl Rabbit Spider [1]
- June 2022, Combined Science Paper 4 Foundation, Q9(a)(ii) (1 mark): How many organisms are there in the longest food chain in the food web diagram? [1]
- June 2022, Combined Science Paper 4 Foundation, Q9(a)(iii) (2 marks): A disease reduced the number of caterpillars in the garden. What could happen to the number of snails in the garden? Explain your answer. Number of snails Expla
- June 2022, Combined Science Paper 4 Foundation, Q9(b) (2 marks): One food chain from the garden food web is grass grasshopper vole fox On average the transfer of biomass between organisms is 10% efficient. The biomass of gras
- June 2022, Combined Science Paper 8 Higher, Q2(a)(i) (1 mark): Which two organisms from the list below are secondary consumers in the food web diagram? Tick (✓) two boxes. Greenfly Hedgehog Lettuce Owl Rabbit Spider [1]
- June 2022, Combined Science Paper 8 Higher, Q2(a)(ii) (1 mark): How many organisms are there in the longest food chain in the food web diagram? [1]
- June 2022, Combined Science Paper 8 Higher, Q2(a)(iii) (2 marks): A disease reduced the number of caterpillars in the garden. What could happen to the number of snails in the garden? Explain your answer. Number of snails Expla
- June 2022, Combined Science Paper 8 Higher, Q2(b) (2 marks): One food chain from the garden food web is grass grasshopper vole fox On average the transfer of biomass between organisms is 10% efficient. The biomass of gras
- November 2021, Biology Paper 1 Foundation, Q3(a)(i) (1 mark): Write down the number which represents photosynthesis. [1]
- November 2021, Biology Paper 1 Foundation, Q3(a)(ii) (1 mark): Write down a number which represents respiration. [1]
- November 2021, Biology Paper 1 Foundation, Q3(b) (2 marks): Fungi are decomposers which secrete enzymes. How do enzymes help fungi to absorb food molecules? [2]
- November 2021, Biology Paper 1 Foundation, Q3(c) (2 marks): One estimate for the total global biomass is 550.0 billion tonnes. Some scientists estimate that 25% of the total global biomass is fungi. Calculate how many bi
- November 2021, Biology Paper 1 Foundation, Q5(a)(i) (1 mark): A producer. [1]
- November 2021, Biology Paper 1 Foundation, Q5(a)(ii) (1 mark): A consumer. [1]
- November 2021, Biology Paper 1 Foundation, Q5(a)(iii) (1 mark): An abiotic component. [1]
- November 2021, Biology Paper 1 Foundation, Q5(b) (2 marks): Scientists use technical terms to describe different levels of organisation within an ecosystem. Draw lines to connect each technical term to its correct descri
- November 2021, Biology Paper 5 Higher, Q8(c)(ii) (2 marks): Photosynthesis is part of the carbon cycle. Give two reasons why the carbon cycle is important to living things. 1 2 [2]
- November 2021, Biology Paper 5 Higher, Q8(c)(iii) (2 marks): Complete each sentence about the role of microorganisms in the carbon cycle. Use the words. You can use each word once, more than once, or not at all. enzymes p
- November 2020, Biology Paper 1 Foundation, Q8(d) (2 marks): The birds in Amaya’s garden are part of a community that includes plants and other animal species. The species in this community are interdependent. Give two re
- November 2020, Biology Paper 5 Higher, Q1(d) (2 marks): The birds in Amaya’s garden are part of a community that includes plants and other animal species. The species in a community are interdependent. Give two reaso
- June 2019, Biology Paper 1 Foundation, Q1(a)(i) (2 marks): Draw lines to connect each organism, below, to its role in the food web. Organism Role Herring 1st consumer Phytoplankton 2nd consumer Zooplankton Producer [2]
- June 2019, Biology Paper 1 Foundation, Q1(a)(ii) (2 marks): Write down the names of the three animals in the food web that eat herring. 1 2 3 [2]
- June 2019, Biology Paper 5 Higher, Q2(a)(i) (1 mark): Humans catch and eat herring. Add humans to the food web in Fig. 2.1. [1]
- June 2019, Biology Paper 5 Higher, Q2(a)(ii) (2 marks): Explain why seals and killer whales are described as competitors. [2]
- June 2019, Biology Paper 5 Higher, Q2(a)(iv) (1 mark): What is the name of the biomass producer in the North Sea food web in Fig. 2.1? [1]
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