Final answer:
The Ediacaran period had a diverse biota consisting of various organisms, including feather-like forms. Recent evidence suggests the presence of more complex animal species during this time. Fossils of Ediacaran organisms like Cyclomedusa, Dickinsonia, and Spriggina have been discovered.
Step-by-step explanation:
The biota in the Ediacaran period consisted of various organisms that were just a few mm or cm long, but some feather-like forms could reach lengths of over a meter. These organisms are collectively known as Ediacaran biota. Recent scientific evidence suggests that more complex animal species lived during this time. Fossils of Ediacaran organisms, such as Cyclomedusa, Dickinsonia, and Spriggina, have been found dating back to this period.