Colonial protists
The first animal is thought to resemble current phyla such as sponges or cnidarians, based on genetic analyses and fossil evidence. These early animals likely had simple body plans and lacked complex features seen in more derived phyla.
Archaebacteria share genetic similarities with Earth's earliest organisms, suggesting a common ancestry. They thrive in extreme environments similar to those of early Earth, indicating they may have adapted and survived in these conditions for billions of years. Their simple cellular structure and metabolic pathways resemble those thought to be present in the earliest life forms.
Members of the domain Archaea are called "archaea" because they were initially thought to be ancient and primitive organisms that resemble the earliest forms of life on Earth. They were given this name as a reflection of their perceived evolutionary significance as ancient organisms that have persisted through time.
i thought they're just called micro organisms
well it's a rough estimete but it is thought to be 300 - 500 million years ago from an early dinosaur. I couldn't find out the name and sorry about i couldn't make it exact.
They thought is was flat.
The earliest known group of living organisms are believed to be prokaryotes, such as bacteria and archaea. They are single-celled organisms that lack a distinct nucleus and other membrane-bound organelles. Prokaryotes are thought to have appeared on Earth billions of years ago.
The animals that lived 530 million years ago that resembled lancelets but had a brain and skull are believed to be early chordates called "Haikouichthys." These organisms are thought to be some of the earliest vertebrates, showing features that are more advanced than their lancelet relatives, such as a primitive brain and skull structure.
1 Cyanobacteria 2 Oxygen is major atmospheric gas 3 Shielding of Earth from ultraviolet rays 4 Organisms with hard parts 5 Invertebrate 6 Complex Organism 7 Fish 8 Amphibians 9 Reptile 10 Pangaea
Sponges were once thought to be plants because they exhibit some plant-like characteristics, such as their stationary nature and lack of obvious sensory organs. Additionally, they can resemble certain aquatic plants in appearance.
Pluto is thought to resemble Neptune's moon Triton.
The first known living organisms on Earth were likely single-celled prokaryotes, such as bacteria and archaea, which appeared around 3.5 billion years ago. These simple organisms were among the earliest forms of life to emerge on our planet.