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- https://bio.libretexts.org/Courses/Evergreen_Valley_College/BIO_Majors_4A_4B_Lab_Manual_2023/26%3A_Animal_Diversity/26.01%3A_IntroductionDevelopmental characteristics include the number of germ tissue layers formed during development, the origin of the mouth and anus, the presence or absence of an internal body cavity, and other featur...Developmental characteristics include the number of germ tissue layers formed during development, the origin of the mouth and anus, the presence or absence of an internal body cavity, and other features of embryological development, such as larval types or whether or not periods of growth are interspersed with molting.
- https://bio.libretexts.org/Courses/Thompson_Rivers_University/Principles_of_Biology_II_OL_ed/03%3A_Systematics_Phylogeny_and_Biological_Diversity/3.03%3A_History_of_Life_on_Earth/3.3.03%3A_Evidence_for_Early_LifeProkaryotic organisms were the first living things on earth and still inhabit every environment, no matter how extreme. Prokaryotes are well adapted to living in all types of conditions, including ext...Prokaryotic organisms were the first living things on earth and still inhabit every environment, no matter how extreme. Prokaryotes are well adapted to living in all types of conditions, including extreme ones, and some prefer to live in colonies called biofilms. Archaea are believed to have evolved from gram-positive bacteria and can occupy more extreme environments.
- https://bio.libretexts.org/Workbench/General_Biology_I_and_II/05%3A_Unit_V-_Biological_Diversity/5.1%3A_The_Origin_and_Diversity_of_Life/5.1.3%3A_Evidence_for_Early_LifeProkaryotic organisms were the first living things on earth and still inhabit every environment, no matter how extreme. Prokaryotes are well adapted to living in all types of conditions, including ext...Prokaryotic organisms were the first living things on earth and still inhabit every environment, no matter how extreme. Prokaryotes are well adapted to living in all types of conditions, including extreme ones, and some prefer to live in colonies called biofilms. Archaea are believed to have evolved from gram-positive bacteria and can occupy more extreme environments.
