Question

can you think of reasons why more complex organisms cannot give rise to new individual through regeneration? itzz urgent please

Answer 1

The complex organisms don't have the capacity of dividing cells so the cells cant produce another individual.. complex organisms either have to sexually to give rise to offspring due the complexity in their structures..
only some members of phylum platyhelminthes like planaria have high regenerating capacity

Answer 2

ANSWER ==> Regeneration is the ability of an organism to replace lost or injured parts so as to form the whole individual from an incomplete form or fragment by remodelling and growth of somatic cells through dedifferentiation, division, morphogenesis and redifferentiation. The ability for regenerative multiplication is present in simpler organisms because most of their cells can undergo dedifferentiation. However, it is limited to certain cells in complex organisms.

¡) The stem cells of complex organisms can form lost tissues and organs but not the complete individual as the highly differentiated tissues and organs do not allow this.

¡¡) In complex organisms Regeneration is under neurohormonal control. Fragments do not have nervous or hormonal stimulus to grow into complete organisms.