This checkpoint tests the third block of the unit: digestive-system basics, waste removal, plant inputs, comparison of plant and animal living systems, and how disruption in one component can affect wider system function.
This checkpoint combines inputs, outputs, comparison and disruption, so strong performance means you can explain living systems as connected structures rather than isolated facts.
Digestive-system basics, nutrient input, waste removal and the role of excretory processes.
Plant inputs including water, minerals and light, with roots and leaves linked to intake and exchange.
Comparing plant and animal systems using structure, role and function rather than labels alone.
Cause-and-effect reasoning about what happens when one system component is disrupted.
Wrong: Only animals need to remove waste
Right: All living systems produce unwanted products and need to remove them to keep functioning effectively.
Wrong: Plants get their food from soil
Right: Plants make their own food using light energy through photosynthesis; they take in water and minerals from the soil, not food.
Wrong: Comparing plants and animals means listing differences
Right: Strong comparisons use role and function to show how similar life jobs are done by different structures.
Wrong: If one part is damaged, only that part is affected
Right: In a living system, disruption to one component can affect wider function because the parts are connected and depend on each other.
1. What is the main role of the digestive system in this block of the unit?
2. Why does waste removal matter in living systems?
3. Which set lists the key plant inputs from Lesson 13?
4. Which statement best compares plant and animal living systems?
5. Why is it stronger to compare plants and animals using role and function?
6. Which statement about roots is correct in this block?
7. A plant has badly damaged roots. Which answer best shows a likely wider effect?
8. Which explanation best shows system disruption in animals?
9. What is the best overall reasoning pattern for explaining disruption?
10. What is the strongest overall understanding of Lessons 11-15?
Visual showing what enters and leaves a living system for both a plant and an animal, with arrows and labels for each process.
Diagram showing how damaged roots lead to reduced water uptake, then wilting leaves, then poorer overall function in a plant.
Explain the difference between getting useful materials in and removing waste in living systems. 1 mark for defining input. 1 mark for defining waste removal. 1 mark for why inputs matter. 1 mark for why waste removal matters.
Compare how a plant and an animal each obtain useful materials needed for survival. 1 mark for plant inputs with structures. 1 mark for animal inputs with systems. 1 mark for stating both need materials. 1 mark for stating both are organised systems.
Use one plant example or one animal example to explain how disruption in a single component can affect a wider living system. 1 mark for naming a component. 1 mark for stating its normal role. 1 mark for explaining the disruption. 1 mark for describing a wider effect. 1 mark for linking back to system thinking.
1: B. The digestive system helps obtain and process nutrients from food.
2: D. Waste removal matters because unwanted products need to be removed for effective function.
3: A. The key plant inputs are water, minerals and light.
4: C. This is the strongest comparison statement from Lesson 14.
5: B. Role and function comparison works because similar life jobs can be done differently.
6: D. Roots are linked to taking in water and minerals.
7: A. This shows the wider plant effect rather than only the local change.
8: C. Reduced gas exchange can affect the rest of the body through reduced supply.
9: B. That is the strongest systems reasoning chain.
10: D. This captures the main understanding across Lessons 11-15.
Getting useful materials in means taking in things needed for survival, such as nutrients, water, gases or light depending on the organism. Removing waste means getting rid of unwanted products so the living system can keep functioning effectively.
1 mark for defining input. 1 mark for defining waste removal. 1 mark for why inputs matter. 1 mark for why waste removal matters.
Plants obtain useful materials using structures such as roots and leaves. Roots take in water and minerals, while leaves are linked to light access and gas exchange. Animals obtain useful materials using systems such as digestion and respiration, which help bring in nutrients, water and gases. Both rely on organised structures to obtain what they need.
1 mark for plant inputs with structures. 1 mark for animal inputs with systems. 1 mark for stating both need materials. 1 mark for stating both are organised systems.
Example: damaged roots in a plant. Roots normally take in water and minerals. If roots are damaged, intake is reduced. That means other parts such as stems and leaves receive less of what they need, so wider plant function is affected. This shows that one disrupted component can affect the whole living system.
1 mark for naming a component. 1 mark for stating its normal role. 1 mark for explaining the disruption. 1 mark for describing a wider effect. 1 mark for linking back to system thinking.
Living systems need to obtain useful materials and remove unwanted products.
Both are organised living systems, but they use different structures to do life functions.
When one component is affected, wider function can also be affected.
Next block introduces stable internal conditions and the first steps into homeostasis.