If plants are given only visible light,their growth will:

In an experiment demonstrating the evolution of oxygen in $Hydrilla$,sodium bicarbonate is added to water in the experimental set-up. What would happen if all other conditions are favourable?

In which of the following are stomata absent?

Which $C_3$ plants are used in greenhouse crops?

Photosynthetic organisms occur at different depths in the ocean. Do they receive qualitatively and quantitatively the same light? How do they adapt to carry out photosynthesis under these conditions?

How can plants be grown under limited water supply without compromising on metabolic activities?