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Edexcel · GCSE · Sciences

Biology: Organisms and Ecosystems
Practice Questions

15 Edexcel GCSE Sciences questions on Biology: Organisms and Ecosystems, each with instant feedback and a full examiner-style mark scheme.

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Try 2 sample questions on Biology: Organisms and Ecosystems

Question 1 · 1 mark · Difficulty 1/3

The maintenance of a constant internal environment is called:

  1. osmosis
  2. homeostasis
  3. photosynthesis
  4. digestion
Show answer & explanation
✓ Answer: B — homeostasis
Homeostasis keeps internal conditions stable.
Question 2 · 1 mark · Difficulty 1/3

What is an abiotic factor?

  1. A non-living physical or chemical factor in an ecosystem (e.g. temperature, light, water, pH)
  2. A type of organism
  3. A biotic factor
  4. A living factor
Show answer & explanation
✓ Answer: A — A non-living physical or chemical factor in an ecosystem (e.g. temperature, light, water, pH)
Abiotic factors include light intensity, temperature, moisture, soil pH, wind speed, CO₂ concentration, and mineral content. They affect the distribution of organisms.
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Edexcel GCSE Sciences: Biology: Organisms and Ecosystems FAQ

Is Kramizo free for Edexcel GCSE students preparing for Sciences?
Yes — completely free. Every student gets 45 questions a day on the free plan, with no card required and no trial countdown. That free quota works across every subject and every topic in our bank, so you can mix Biology: Organisms and Ecosystems practice with other Sciences topics or even switch to a totally different Edexcel subject without paying anything. Kramizo's optional Pro plan removes the daily cap and adds detailed progress analytics, but the free tier is the real product — used by thousands of GCSE, IGCSE and CSEC students.
Are the Biology: Organisms and Ecosystems questions aligned to the official Edexcel GCSE Sciences syllabus?
Every question is written against the published Edexcel GCSE Sciences specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real Edexcel paper. Explanations are written in the style of official examiner mark schemes — they tell you what is being awarded marks and why distractors are wrong, not just whether you got it right. The bank is continually refined to match the latest syllabus updates from Edexcel.
How is Biology: Organisms and Ecosystems typically tested on Edexcel GCSE Sciences papers?
Biology: Organisms and Ecosystems appears across multiple question types on real Edexcel GCSE Sciences papers — most commonly as multiple-choice questions in the objective section, structured short-answer questions in the main paper, and occasionally as part of an extended response. Kramizo's practice bank reflects that mix: 4-option MCQs, true/false statements, fill-in-the-blank key terms, multi-select questions, and ordering questions. Working through the bank gives you exposure to every question style examiners actually use.

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