Which step in photosynthesis does not need light? (1 point)
Carbon dioxide and hydrogen combine to make glucose.
O Water splits into hydrogen and oxygen,
Chlorophyll absorbs energy.
Oxygen is released
The step in photosynthesis that does not require light is when carbon dioxide and hydrogen combine to form glucose. This process is known as the Calvin cycle or the dark reaction. Here's how you can remember it:
1. Step 1: Light-dependent reaction
During this step, chlorophyll absorbs energy from sunlight. The energy is used to split water into hydrogen and oxygen. Oxygen is released as a byproduct.
2. Step 2: Light-independent reaction
This step is also known as the Calvin cycle or the dark reaction. It doesn't require direct sunlight and can occur in the absence of light. In this step, carbon dioxide from the atmosphere combines with hydrogen molecules to produce glucose. The process takes place in the stroma of the chloroplast.
So, the correct answer is: Carbon dioxide and hydrogen combine to make glucose.