Question

the diagram summarizes the light - dependent reactions of photosynthesis.
what is the input of the light - dependent reactions, labeled x?
co₂, h₂o, o₂, and light
co₂, h₂o, and light
co₂ and h₂o
h₂o and light

Explanation:

In the light - dependent reactions of photosynthesis, water (\(H_2O\)) is split (photolysis) and light (solar energy) is absorbed by chlorophyll. Carbon dioxide (\(CO_2\)) is used in the light - independent (Calvin cycle) reactions. Oxygen (\(O_2\)) is a product of the light - dependent reactions, not an input.

Answer:

\(H_2O\) and light.