Cells in different organisms can vary greatly. This is due to various cell functions. For example, plants in the cells have chloroplasts to support the photosynthesis process. Some cells have nuclei. These are eukaryotic cells. Those that do not have nuclei are prokaryotic. The presence of certain elements affects the amount of spare energy substances and cell functions. Any organism strives for simplification, but with the preservation of useful devices. This occurs primarily at the cellular level.
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.