Any of the terminal or smaller branches of an axon that terminates with specialized ending that releases neurotransmitters. Telodendria originally refer to the terminal branches of dendrites, now they refer to the main or terminal arborization of an axon. Word origin: Greek tÃ©los (end) + Greek dÃ©ndron (tree).
Permineralization is one of the ways in which a plant or animal can be turned into a fossil. During this process, mineral rich water seeps into the void spaces of an organism, leaving deposits of minerals behind that slowly build up, creating a cast of the organism.
Petrified wood is an example of this process, which is called permineralization. At other times, the minerals in the groundwater actually replace the minerals that make up the remains. So over time the hard parts are completely replaced by other minerals. This process is called replacement. Other important fossils are impressions and molds. These are made when a hard part such as a shell, fills up with sediments that harden, and then the actual shell dissolves leaving nothing but the sediment mold. These molds can tell us much about the body structures of animals and plants.