Weegy: Prokaryotes are single-celled organisms that are the earliest and most primitive forms of life on earth. As organized in the Three Domain System, prokaryotes include bacteria and archaeans. [ Prokaryotes are able to live and thrive in various types of environments including extreme habitats such as hydrothermal vents, hot springs, swamps, wetlands, and the guts of animals.
Read more : ]
User: 1. Scientists believe that ancient ancestors of all animals were (1 point)
single-celled prokaryotes that reproduced asexually.
single-celled eukaryotes that sometimes grew in colonies.
multicellular organisms that were probably autotrophic.
multicellular organisms with an alternation of generations lifecycle.
(More)