Question

1. in our floating discs labs the leaf discs floated in the presence of sunlight because as the cells were performing photosynthesis, they were producing a gas. what gas were they producing? a. oxygen b. carbon dioxide c. nitrogen 4. the 3 main things that plants need for photosynthesis are:______________________

Explanation:

For question 3, during photosynthesis, plants produce oxygen gas. For question 4, the three main things plants need for photosynthesis are carbon - dioxide, water and sunlight.

Answer:

1. A. oxygen
2. carbon dioxide, water, sunlight