In lower organisms there are no other embodied spiritual bodies (such as the [[Astral body|astral body]] or [[I]]) though these forces relate from the outside- in plants growth rhythms are regulated by planetary influences. One remarkable difference between plants and animal form development is the lack of [[apoptosis]] (programmed cell death) in plant forms. In animals and humans apoptosis is essential for development and improper coordination of this results in birth defects<ref>{{Cite journal|last=Haanen|first=C|last2=Vernes|first2=I|date=January 1996|title=Apoptosis: programmed cell death in fetal development|url=|journal=Eur J Obstet Gynecol Reprod Biol|volume=64|issue=1|pages=129-33|doi=10.1016/0301-2115(95)02261-9|pmid=8801138|via=}}</ref>. | In lower organisms there are no other embodied spiritual bodies (such as the [[Astral body|astral body]] or [[I]]) though these forces relate from the outside- in plants growth rhythms are regulated by planetary influences. One remarkable difference between plants and animal form development is the lack of [[apoptosis]] (programmed cell death) in plant forms. In animals and humans apoptosis is essential for development and improper coordination of this results in birth defects<ref>{{Cite journal|last=Haanen|first=C|last2=Vernes|first2=I|date=January 1996|title=Apoptosis: programmed cell death in fetal development|url=|journal=Eur J Obstet Gynecol Reprod Biol|volume=64|issue=1|pages=129-33|doi=10.1016/0301-2115(95)02261-9|pmid=8801138|via=}}</ref>. |