The Main Source of Water Necessary for Photosynthesis to Occur

Question

The main source of water necessary for photosynthesis to occur in the leaf mesophyll is
A) soil via the phloem.
B) soil via the xylem.
C) the atmosphere through the cuticle and stomata.
D) all of the above.

Accepted Answer

The main source of water for photosynthesis in leaf mesophyll is soil via the xylem, which delivers water and minerals from the roots to the leaves. Water absorbed by the roots from the soil is transported through the xylem to the leaves, where it fills the spongy mesophyll cells and provides the necessary water for photosynthesis. Water is not transported via the phloem, which primarily transports sugars and other organic substances from the leaves to other parts of the plant. Water is also not directly absorbed from the atmosphere through the cuticle and stomata.