Chloroplasts

Summary: The lower surface of a green leaf is lighter than the top. This is because the cells in the bottom of the leaf contain fewer chloroplasts, which means there is less chlorophyll. Most sunlight hits the top of the leaf. Therefore, this is where the chloroplasts need to be to absorb as much sunlight as possible. Tags: science student-book-7 biology Created: 2026-05-21 Last Updated: 2026-05-21

Chloroplasts

The lower surface of a green leaf is lighter than the top. This is because the cells in the bottom of the leaf contain fewer chloroplasts, which means there is less chlorophyll. Most sunlight hits the top of the leaf. Therefore, this is where the chloroplasts need to be to absorb as much sunlight as possible.

Source

This concept is from the [Science Student Book 7](Science Student Book 7/Biology/Plants/4.2 Leaves.md), Biology section.