Rice, maize and wheat plants provide the principal carbohydrate supply for over 60% of the human population.
(a)[5]
Describe how plants like these make carbohydrates from substances taken from the environment.
(b)[5]
Many scientists predict that, as the world’s human population grows, food will become scarce. Suggest and explain why an increase in human population is expected to cause a worldwide human food shortage.
Worked solution & mark scheme
This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: “the process of photosynthesis” …