What is Protosterol Biota?

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About Protosterol Biota:

It is the microscopic organism, belongs to the family of organisms called eukaryotes.
These are discovered inside a rock at the bottom of the ocean near what is now the Northern Territory in Australia.
They have a complex structure combining mitochondria.

What are eukaryotes?

These cells possess a clearly defined nucleus.
These cell have a nuclear membrane that surrounds the nucleus, in which the well-defined chromosomes (bodies containing the hereditary material) are located.
These cells also contain organelles, including mitochondria (cellular energy exchangers), a Golgi apparatus (secretory device), an endoplasmic reticulum (a canal-like system of membranes within the cell), and lysosomes (digestive apparatus within many cell types).
These are thought to have evolved between about 1.7 billion and 1.9 billion years ago.

Q1) What are Prokaryotes?

Prokaryotes are a group of organisms that constitute one of the two major domains of life, the other being eukaryotes. They are single-celled organisms that lack a distinct nucleus and other membrane-bound organelles. Prokaryotes include bacteria and archaea.

Source: Lost world of early ancestors discovered. They lived underwater 1.6 billion years ago