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)
A. glucose
B. carbon dioxide
C. hydrogen gas
D. oxygen
B. carbon dioxide should be added to the water in order for the bubbles to reappear.
Hmm, well it looks like this scientist's aquatic plant is going on a little bubble vacation! To bring back those bubbles, we need to give them something they crave. So, which substance should we add to the water? Let's see... A. glucose is like giving the plant a sugar rush, so that's probably not what it needs. C. hydrogen gas might make the plant reach for the sky, but it won't bring back those bubbles. D. oxygen is what the plant produces during photosynthesis, so that won't do the trick either. That leaves us with B. carbon dioxide! The plant needs good ol' CO2 to make its bubbles, just like humans need coffee to make conversation. So, add some carbon dioxide and get ready for bubble mania in the water!
The correct answer is B. carbon dioxide.
During photosynthesis, plants use carbon dioxide (CO2) from the environment, along with water and sunlight, to produce glucose (a form of sugar) and oxygen gas (O2). The small bubbles observed on the surfaces of the plant's leaves indicate the production of oxygen as a byproduct of photosynthesis. If the bubbles were present on days 1 and 2 but disappeared on day 3, it suggests that there is no longer enough carbon dioxide available for the plants to continue photosynthesizing. Thus, adding carbon dioxide to the water will provide the necessary substance for the bubbles to reappear.
To answer this question, we need to understand the process of photosynthesis. Photosynthesis is the process by which plants use sunlight, water, and carbon dioxide to produce glucose (a type of sugar) and oxygen.
In this experiment, the scientist observed bubbles on the surfaces of the plant's leaves on days 1 and 2, indicating that photosynthesis was occurring. However, on day 3, no bubbles were observed, suggesting that photosynthesis had stopped.
To determine which substance should be added to the water in order for the bubbles to reappear, we need to consider the role of each option.
A. Glucose: Glucose is one of the products of photosynthesis, not a requirement for its occurrence. Adding glucose to the water would not directly stimulate the process of photosynthesis.
B. Carbon dioxide: Carbon dioxide is an essential component for photosynthesis. During photosynthesis, plants take in carbon dioxide from their surroundings and convert it into glucose and oxygen. If there is no carbon dioxide present, photosynthesis cannot occur. Therefore, adding carbon dioxide to the water would likely reinitiate the production of bubbles.
C. Hydrogen gas: Hydrogen gas is not directly involved in photosynthesis. Adding hydrogen gas to the water would not stimulate the production of bubbles.
D. Oxygen: Oxygen is a product of photosynthesis. As mentioned earlier, the bubbles observed on days 1 and 2 were likely oxygen bubbles released during photosynthesis. Adding oxygen to the water would not initiate the process of photosynthesis, as it is already a byproduct.
Based on this analysis, the correct answer is B. Carbon dioxide. Adding carbon dioxide to the water would provide the necessary component for photosynthesis to occur again and would likely result in the reemergence of bubbles on the plant's leaves.