Intellectual or developmental disabilities: Types list. The list of types of Intellectual or developmental disabilities mentioned in various sources includes: 1  Cornea Plana 1. 2  Pervasive developmental disorders. 3  Autism. 4  Asperger syndrome. 5  Autism, susceptibility to, 13. 6  Autism, susceptibility to, 10. 7  Autism, susceptibility to, 11.
Definition of MERISTEM. : a formative plant tissue usually made up of small cells capable of dividing indefinitely and giving rise to similar cells or to cells that differentiate to produce the definitive tissues and organs. â merÂ·iÂ·steÂ·matÂ·ic \Ëmer-És-tÉ-Ëma-tik\ adjective.
1 meristem-a region of rapid mitosis, which produces the new cells for root growth. 2  root cap-a sheath of cells that protects the meristem from abrasion and damage as the root tip grows through the soil.he Root Tip. 1  meristem-a region of rapid mitosis, which produces the new cells for root growth. 2  root cap-a sheath of cells that protects the meristem from abrasion and damage as the root tip grows through the soil.