Question

17. Orangutans get most of the energy they need from fruit. Energy must go through several steps before it

can be used by the cells in the orangutan's body. Number the steps to show the path energy follows from
the sun to the orangutan's cells.

Answer 1

1. Energy from the sun is absorbed by plants through photosynthesis.
2. The plants convert the energy from the sun into chemical energy through the process of photosynthesis.
3. The orangutan eats the fruit, which contains the chemical energy stored by the plants.
4. The orangutan's digestive system breaks down the fruit and releases the chemical energy stored in the fruit's molecules.
5. The chemical energy is converted into ATP (adenosine triphosphate), a molecule that cells can use for energy.
6. The ATP is transported to the cells in the orangutan's body.
7. The cells use the ATP to carry out their functions, releasing energy in the process.