Consider the following passage. Plant leaves are organs that are composed of multiple cell types, including palisade cells and
guard cells. Palisade cells contain many chloroplasts and are the main sites of photosynthesis in
a leaf. Guard cells are specialized epidermal cells that can change shape in order to control gas
exchange between the leaf and its surroundings.
Which claim is best supported by evidence provided in the passage?
Choose 1
A leaf is primarily made up of one cell type, which allows it to carry out the process of
photosynthesis.
B
Palisade and guard cells each have the capacity to carry out all the functions of the leaf.
independently.
The various cell types found in a leaf have unique, specialized functions.