Question

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

carbon dioxide
carbon dioxide

oxygen
oxygen

hydrogen gas
hydrogen gas

glucose

Answer 1

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

Photosynthesis requires carbon dioxide, water, and light to produce glucose and oxygen. 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 undergo photosynthesis effectively, leading to no bubble production. Adding carbon dioxide would help stimulate the process and potentially lead to the reappearance of the bubbles.