Final answer:
Plants are set apart from photosynthetic protists by the presence of a multicellular, dependent embryo.
Step-by-step explanation:
The statement that sets plants apart from photosynthetic protists is FALSE. The characteristic that distinguishes plants from photosynthetic protists is the presence of a multicellular, dependent embryo.
This means that the embryo of a plant remains attached to the parent plant, which protects and nourishes it. This is a unique feature of plants and is not found in photosynthetic protists.