A scientist fills a glass container with water and places an aquatic plant inside the container, then closes the lid and places the container in direct sunlight. The scientists observes small bubbles on the surface of the plant's leaves on days 1 and 2, but no bubbles on day 3. The scientist concludes that the bubbles were caused by photosynthesis. Which substance should be added to the water in order for the bubbles to reappear.

Question

*
1 point
carbon dioxide
oxygen gas
hydrogen gas
glucose
I am in Biology

Answer 1

The correct answer is carbon dioxide. Carbon dioxide is a reactant required for photosynthesis to take place, and the bubbles observed are likely oxygen gas produced as a byproduct of the photosynthesis process. By adding more carbon dioxide to the water, the aquatic plant will be able to continue photosynthesizing and producing oxygen bubbles.