26 exam-style questions. Write your answer, check it against the mark scheme and tick the points you earned. Your marks stay on this device. Your writing is not saved.
Ratings are saved in this browser on this device, under a KS4 key kept separate from International A Level recall. Written answers are temporary and cleared when you leave the page. Use Reset to clear the ratings on this device.
4.33 Genetic and environmental variation
Exam question
Mark points shown after marking
Explain what causes variation between individuals of the same species.
(3)Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 3 marks
4.33 Genetic and environmental variation
Exam question
Mark points shown after marking
Which feature is caused by environment only?
(1)Total for this question: 1 mark
4.33 Genetic and environmental variation
Exam question
Mark points shown after marking
Compare continuous and discontinuous variation.
(2)Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 2 marks
4.33 Genetic and environmental variation
Exam question
Mark points shown after marking
Explain why identical twins are useful for studying variation.
(2)Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 2 marks
4.33 Genetic and environmental variation
Exam question
Mark points shown after marking
Identify which of these show continuous variation: mass, blood group, tongue rolling, hand span.
(2)Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 2 marks
4.33 Genetic and environmental variation
Exam question
Mark points shown after marking
Explain why plants grown from cuttings of one plant can differ in height.
(2)Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 2 marks
Plan it with CORMMSS: Design an investigation (Logic Lab).
4.33 Genetic and environmental variation
Exam question
Mark points shown after marking
Link: practise planning on /subjects/igcse-biology/logic-lab/design-an-investigation.
Design an investigation to find out whether light intensity affects the height of genetically identical plants.
(6)Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 6 marks
4.33 Genetic and environmental variation
Exam question
Mark points shown after marking
Explain why cuttings rather than seeds are used in this investigation.
(2)Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 2 marks
4.33 Genetic and environmental variation
Exam question
Mark points shown after marking
Illustrative class data.
| Height / cm | Number of students |
|---|---|
| 140–149 | 2 |
| 150–159 | 6 |
| 160–169 | 11 |
| 170–179 | 7 |
| 180–189 | 2 |
Explain what type of variation the data shows.
(2)Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 2 marks
4.33 Genetic and environmental variation
Exam question
Mark points shown after marking
| Height / cm | Number of students |
|---|---|
| 140–149 | 2 |
| 150–159 | 6 |
| 160–169 | 11 |
| 170–179 | 7 |
| 180–189 | 2 |
Calculate the percentage of students who are 170 cm or taller.
(2)Total for this question: 2 marks
4.33 Genetic and environmental variation
Exam question
Mark points shown after marking
| Height / cm | Number of students |
|---|---|
| 140–149 | 2 |
| 150–159 | 6 |
| 160–169 | 11 |
| 170–179 | 7 |
| 180–189 | 2 |
Suggest why a bar chart with no gaps (histogram) is used for this data.
(2)Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 2 marks
4.33 Genetic and environmental variation
Exam question
Mark points shown after marking
Explain why a person's mass is affected by both genes and environment.
(2)Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 2 marks
4.33 Genetic and environmental variation
Exam question
Mark points shown after marking
Which type of variation is ABO blood group?
(1)Total for this question: 1 mark
4.33 Genetic and environmental variation
Exam question
Mark points shown after marking
Describe how to collect data on hand span in a class.
(2)Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 2 marks
4.33 Genetic and environmental variation
Exam question
Mark points shown after marking
Suggest why the number of leaves on plants grown from seeds varies more than on plants grown from cuttings.
(2)Write your answer, then press Show model answer and tick each mark point your answer makes. Your answer is not saved.
Total for this question: 2 marks
