Is it possible to consider that all cells of a green plant eat autotrophically?

No, since the process of photosynthesis proceeds only in those cells that contain chloroplasts (leaf, stem). Photosynthesis does not occur in cells without chloroplasts; therefore, such cells consume ready-made organic substances synthesized by other cells of the body (root).

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.