Module 4 · Practice
Practice questions
Three difficulty levels.
Section A — Easy
Write the word equation for photosynthesis. State what else is needed for it to happen.
Write the word equation for aerobic respiration.
Name the part of the cell where aerobic respiration takes place.
Which mineral does a plant need to make:
What do the arrows in a food chain represent?
Section B — Medium
State three ways a leaf is adapted for photosynthesis. Explain one of them.
An athlete sprints 100m. Explain why their muscles begin to ache part-way through and continue to feel sore afterwards.
In a food chain: grass → rabbit → fox → eagle, what would happen to the rabbit population if foxes were removed? Explain.
A pesticide is sprayed on a field at low concentration. Top predators in the food chain die first. Explain why.
State two differences between aerobic and anaerobic respiration in animals.
Section C — Hard
A grower notices that his tomato plants have yellow leaves. Suggest two possible mineral deficiencies and how to test which one is the problem.
Yeast is added to sugar solution and the mixture is sealed. After a few hours, the bottle bulges and a smell of alcohol develops. Explain.
Photosynthesis and respiration appear to be opposite processes. Explain why a plant in daylight is doing both at the same time, and why at night it is only doing one.
An invasive plant arrives in a freshwater lake and grows over the surface, blocking light. Predict the effect on the lake's ecosystem in three steps.