The leaf cells of green plants usually contain chloroplasts. The root cells of green plants do not usually contain these structures, or contain fewer of them. Which statement best explains why? (1 point)
Leaf cells are large enough to contain chloroplasts, but root cells are not.
Root cells are simpler and do not need energy to perform their specialized functions.
Root cells eject organelles to make space for water and nutrients to pass through the roots.
Leaf cells are the primary site for light-dependent chemical reactions.