Corals consist of many tiny animals that live together in the sea, and their skeletons build coral reefs. Inside the cells of these animals are microscopic green, plant-like organisms known as algae.
(a)[2]
Identify the process by which the algae make food and explain why this is the correct answer.
(b)[5]
The corals and the algae rely on one another for survival. Suggest how the algae benefit from the corals and how the corals benefit from the algae.
(c)[3]
An increase in the average sea temperature over the past 20 years has led the algae to produce chemicals that are poisonous to the corals. Suggest and explain the long-term effect of this temperature rise on the corals and on the algae.
Worked solution & mark scheme
This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: “the process called photosynthesis” …