Scientists used radioactive hydrogen to make water. The scientists grew plants using the radioactive water. Based on their observations, they concluded that hydrogen is recycled during photosynthesis. Which observation provides evidence for this conclusion? (1 point)
Responses
Hydrogen gas in the surrounding air was radioactive.
Hydrogen gas in the surrounding air was radioactive.
Water vapor near the plant was radioactive.
Water vapor near the plant was radioactive.
Light in the plant’s leaves was radioactive.
Light in the plant’s leaves was radioactive.
Glucose in the plant’s stem was radioactive.
1 answer
Glucose in the plant’s stem was radioactive.
1 answer