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HomeCXC CSEC BiologyExperimental Design and Analysis of Biological Investigations
CXC · CSEC · Biology

Experimental Design and Analysis of Biological Investigations
Practice Questions

20 CXC CSEC Biology questions on Experimental Design and Analysis of Biological Investigations, each with instant feedback and a full examiner-style mark scheme.

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Try 2 sample questions on Experimental Design and Analysis of Biological Investigations

Question 1 · 1 mark · Difficulty 1/3

A student in Trinidad investigated the effect of light intensity on the rate of photosynthesis in aquatic plants. She used the same plant species, the same volume of water, and the same temperature throughout the experiment. Which term describes the factors she kept the same?

  1. Independent variables
  2. Dependent variables
  3. Controlled variables
  4. Responding variables
Show answer & explanation
✓ Answer: CControlled variables
Award 1 mark for identifying that controlled variables are factors kept constant to ensure a fair test. A is incorrect — the independent variable is what the experimenter deliberately changes (light intensity). B is incorrect — the dependent variable is what is measured (rate of photosynthesis). D is incorrect — responding variable is another term for dependent variable.
Question 2 · 1 mark · Difficulty 1/3

In an investigation into mosquito breeding sites in Barbados, a researcher recorded the number of Aedes aegypti larvae found in containers with different volumes of stagnant water. The volume of water is best described as the

  1. controlled variable
  2. dependent variable
  3. independent variable
  4. confounding variable
Show answer & explanation
✓ Answer: Cindependent variable
Award 1 mark for recognising that the independent variable is the factor deliberately changed by the investigator. A is incorrect — controlled variables are kept constant. B is incorrect — the dependent variable is the number of larvae (what is measured). D is incorrect — confounding variables are uncontrolled factors that may affect results.
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CXC CSEC Biology: Experimental Design and Analysis of Biological Investigations FAQ

How many CXC CSEC Biology questions on Experimental Design and Analysis of Biological Investigations are there on Kramizo?
Kramizo currently has 20 exam-board-aligned practice questions on Experimental Design and Analysis of Biological Investigations for CXC CSEC Biology, with new questions added every week. Each question gives you instant feedback and a full examiner-style mark scheme that tells you exactly what would earn marks on a real CXC paper. The questions span the full difficulty range — from straightforward recall (level 1) right up to multi-step reasoning and evaluation (level 3) — so the bank works for first-pass revision and final exam-week stress testing alike.
Is Kramizo free for CXC CSEC students preparing for Biology?
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 Experimental Design and Analysis of Biological Investigations practice with other Biology topics or even switch to a totally different CXC 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 Experimental Design and Analysis of Biological Investigations questions aligned to the official CXC CSEC Biology syllabus?
Every question is written against the published CXC CSEC Biology specification, including the exact command words (state, describe, explain, calculate, evaluate, etc.), mark allocations, and difficulty tier you'd see on a real CXC 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 CXC.
How is Experimental Design and Analysis of Biological Investigations typically tested on CXC CSEC Biology papers?
Experimental Design and Analysis of Biological Investigations appears across multiple question types on real CXC CSEC Biology 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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