can you think of reasons why more complex organisms cannot give rise to new individuals through regeneration?

More complex organisms cannot give rise to new individuals through regeneration primarily because their bodies have a highly complex organization with specialized cells, tissues, organs, and organ systems. These cells and tissues are differentiated to perform specific functions, and regeneration is limited to replacement or repair of certain tissues, not the formation of a complete new individual. Unlike simple organisms made up of similar cells capable of regenerating the whole body, complex organisms have organ systems that work interconnectedly, making it impossible to reproduce by regenerating just a part of the body. Regeneration in complex organisms is restricted to healing or replacing certain tissues, but they lack the ability to form a fully new individual from those parts.