Palisade cells have a lot of chloroplasts.

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Palisade cells have a lot of chloroplasts.
Water and mineral salts pass up through the stem
of the plant in xylem tubes.
Leaves have a large surface area.
Light is needed for photosynthesis.
Carbon dioxide diffuses into leaves through the
stomata.
Roots take in water and mineral salts from the
soil.
Root hair cells have a large surface area to help
them absorb water.