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For the first 1.5 billion years, prokaryotes ruled the earth (and still do). It was not until about 2,100 million years ago that the first eukaryote evolved. It is hypothesised that the first eukaryote was a result of a larger prokaryote engulfing a smaller prokaryote (symbiosis) and they began to cohabitate together. The evidence for this is that mitochondrian and chlorophylls have their own DNA and are very similar to prokaryotic cells.
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What kinds of organisms live in Earth's most extreme environments and may provide scientists with clues about possible life forms on other planets?
organisms in the archaea kingdom Prokaryotes
Are bacteria and Viruses prokaryotes or eukaryotes?
Bacteria are prokaryotes, viruses are not classified within the six kingdoms of life, and so are neither prokaryotes nor eukaryotes.
Because prokaryotes do not have many specific structures they what?
Specific structures as in any membrane-bound organelles. These are not included in the prokaryotes.
The five kingdoms of life?
The 5 Kingdoms are: Fungi, Plants, Animals, Prokaryotes and Protoctistans.
What life forms were in the proterozoic eon?
There were no life forms as we know them during the Proterozoic period. With oxygen just then being accumulated in the earth's atmosphere, it brought the first advanced single-celled eukaryotes and multi-cellular life forms.
What was earth's first life forms?
bacteria is not right it is prokaryotes
What is the predominant life form on earth?
Prokaryotes.
Why do scientists think that photosynthetic prokaryotes were not the first life forms on Earth?
Scientists suggest that photosynthetic prokaryotes were not the first life forms on Earth because the conditions on early Earth were likely not conducive to sustaining photosynthesis. It is believed that simpler forms of life, such as chemotrophic prokaryotes, which obtain energy through chemical reactions, may have been the first life forms to evolve. Over time, photosynthetic prokaryotes evolved as the environment changed and oxygen started accumulating in the atmosphere.
Why does all life on earth depend upon metabolic diversity of prokaryotes?
Life on earth depend upon metabolic diversity of prokaryotes because Prokaryotic photosynthesis provides free oxygen in the atmosphere
How many years were prokaryotes present on earth before the eukaryotes?
* 3.5 billion years ago the first life arose: prokaryotic bacteria * 1.5 billion years ago eukaryotic cells arose Therefore, prokaryotes were present on earth for 2 billion years prior to the emergence of eukaryotic life.
For how long were prokaryotes the only kind of life on earth?
Prokaryotes were the only kind of life on earth approximately 2 billion years ago. They existed long before eukaryotes ever came into existence at all.
What lived first on earth?
Microscopic single-celled organisms known as prokaryotes, such as bacteria, are believed to have been the first forms of life on Earth. They appeared around 3.5 to 4 billion years ago.
Prokaryotes were presented on earth how many more year before eukaryotes?
* 3.5 billion years ago the first life arose: prokaryotic bacteria * 1.5 billion years ago eukaryotic cells arose Therefore, prokaryotes were present on earth for 2 billion years prior to the emergence of eukaryotic life.
Which sequence correctly represents the evolution of life on earth?
Prokaryotes -> Cyanobacteria -> Eukaryotes -> Multicellular organisms Prokaryotes -> Multicellular organisms -> Eukaryotes -> Cyanobacteria Cyanobacteria -> Prokaryotes -> Eukaryotes -> Multicellular organisms The correct sequence is option 1: Prokaryotes -> Cyanobacteria -> Eukaryotes -> Multicellular organisms. These groups represent a general order of the evolution of life on Earth, starting with simple prokaryotic organisms and culminating in more complex multicellular organisms.
Where protist were the first prokaryotic organisms on Earth?
Protists are eukaryotic organisms, not prokaryotic. Prokaryotic organisms, such as bacteria, were among the first life forms on Earth. The evolution of eukaryotic cells, which eventually led to the emergence of protists, occurred later in Earth's history.
What kinds of organisms live in Earth's most extreme environments and may provide scientists with clues about possible life forms on other planets?
organisms in the archaea kingdom Prokaryotes
Is life on Earth possible without bacteria?
no because bacteria helps digest our food and it also is one of the main decomposers.
