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National 5 Biology- Life on Earth Test Revision Questions and Answers | Latest Version | 2025/2026 | Correct & Verified
What term describes the role an organism plays within its ecosystem?✔✔Niche
What process allows plants to convert light energy into chemical energy?✔✔Photosynthesis
What gas is taken in by plants during photosynthesis?✔✔Carbon dioxide
What is the main source of energy for most ecosystems?✔✔Sunlight
What is the name given to organisms that make their own food using sunlight?✔✔Producers 1 / 2
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What type of consumer feeds only on plants?✔✔Herbivore
Which term describes the total number of different species in an ecosystem?✔✔Biodiversity
What is a feeding relationship that shows a single path of energy flow?✔✔Food chain
What type of organism breaks down dead material and returns nutrients to the soil?✔✔Decomposer
What term is used when one species outcompetes another for resources?✔✔Competition
What is the first organism in any food chain?✔✔Producer
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