Question

Saussure discovered

• A. Use of water in photosynthesis
• B. Use of $C{O}_2$ in photosynthesis
• C. Use of chlorophyll in photosynthesis
• D. Red drop

Answer 1

The correct option is B Use of $C{O}_2$ in photosynthesis

Photosynthesis is the process by which plants and some other living organisms derive energy from light sources—usually the sun. In the early 1800s Nicolas-Théodore de Saussure discovered the use of carbon dioxide in photosynthesis by enclosing plants in glass containers and weighing the plants and enclosed carbon dioxide before and after. He demonstrated that plants absorb carbon dioxide during photosynthesis. This showed that carbon in plants comes from the atmosphere and not the soil as it was believed at that point of time. Hence, the correct answer is option B.