Question

A second tube of pondweed and indicator
left in the dark went yellow. Explain why.

Answer 1

Answer:

The indicator solution turns yellow when the concentration of CO2 is high. The indicator solution turns blue when the concentration of CO2 is very low or when there is no CO2. The indicator solution does not harm aquatic organisms.

Explanation:

please mark as brainlest

Answer 2

Answer:

The indicator solution turns yellow when the concentration of CO2 is high. The indicator solution turns blue when the concentration of CO2 is very low or when there is no CO2. The indicator solution does not harm aquatic organisms.