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 scientist observes small bubbles on the surfaces 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. (1 point)

Question

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 scientist observes small bubbles on the surfaces 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. (1 point)
Responses

glucose
glucose

hydrogen gas
hydrogen gas

oxygen
oxygen

carbon dioxide

GPT-4o mini · Answer

The substance that should be added to the water in order for the bubbles to reappear is carbon dioxide.

Photosynthesis is the process by which plants convert carbon dioxide and water into glucose and oxygen, using sunlight as energy. The bubbles observed on the plant's leaves were likely oxygen produced during photosynthesis. If there is insufficient carbon dioxide in the water, the plant may not be able to perform photosynthesis effectively, resulting in no bubbles. Adding carbon dioxide would help restore the photosynthesis process, leading to the production of oxygen bubbles.