Multiple choice

Which of the following is used by green plants for the manufacture of sugar?

  1. Sun light

  2. Water

  3. Carbon dioxide

  4. All of these

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Plants need energy to grow, to replace worn out cells, to get rid of waste, and to reproduce. All organisms get energy from food. Photosynthesis is the process by which plants make food. Only plants can make food. In this process carbon dioxide and water combine in the presence of light to form sugar, a food.