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.
The secret to these abilities lies within a tissue type called meristem. Meristematic cells are fully developed and functional at maturity, but unlike other cells in the plant, they remain totipotent. This means that when induced, they can develop into any specific plant tissue at any point during the life of the plant.ell division and cell elongation in the apical meristem is called primary growth and results in an increase in plant height and root length. Increasing root length enables the plant to tap into the water and mineral resources of a new region or layer of soil.