answer: the parent can be a single organism
explanation:
it only takes one "parent" single celled organism to asexually reproduce through binary fission
it only takes one "parent" multi celled organism to asexually reproduce through fragmentation or budding
Please be a little more specific on what you want to ask. I can be of some help.
Am certain that the aquifex bacteria might be classified as extremophiles.
Exremophiles are organisms that have been discovered on earth that survive in environments that were once thought not to be able to sustain life. The extreme environments include intense heat, highly acidic environments, extreme pressure and extreme cold. <span />
All organisms that rely on plants for carbon(either directly or indirectly) will die eventually
Hope this helps :))