Which gas is needed for photosynthesis?
oxygen
carbon dioxide
hydrogen
Acid
What type of energy is needed for photosynthesis to happen?
Light
Heat
sound
Static
What is produced as a waste by-product from photosynthesis?
Water
Glucose
Carbon dioxide
Oxygen
The green substance needed to absorb energy for photosynthesis is:
carotene
melanin
chlorophyll
Melanie
Tomatoes in a greenhouse grow faster if the carbon dioxide concentration is increased. This shows that:
Light intensity must have been a limiting factor
Temperature must have been a limiting factor.
Carbon dioxide concentration must have been a limiting factor.
The greenhouse has a fault.
