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[1] There's no all-across-the-board agreement. Some scientists believe the first organisms to be amoebae and fungi, others bacteria. The former are called eukaryotes, because they have nuclei. The latter are called prokaryotes, because they have no nuclei. Those who believe the eukaryotes were first call chloroplasts and mitochondria among the first organisms. Those who believe the prokaryotes were first call the monera among the first organisms. [2] A common assumption has been equating earlier appearance with simplicity. It favors the prokaryotes, for their lack of the more complex nuclei. [3] But a growing argument has been equating earlier appearance with complexity, later appearance with streamlining into simplicity. It favors the eukaryotes, for their nuclei which the projaryotes supposedly jettisoned in their efforts to streamline. [4] Another assumption has been linking earlier appearance with areas of heat, deep within the oceans. It favors the prokaryotes, which handled high temperatures much better than the eurkaryotes. [5] The oldest known fossils date back 3.5 billion years. They're the stromatolites of Glacier National Park. And they contain cyanobacteria microbes. [6] Some scientists say that there's an even older first organism that was the ancestor common to both eurkaryotes and prokaryotes. But they disagree on whether that ancestor evolved first into the former and then the latter, or vice versa.
What else can I help you with?
What happens when a first order consumer dies?
It messes' up the whole food chain or web. It could lead to extinction, and that could hurt all organisms,
Which type of organisms could most successfully colonize with a rock of the volcanic island?
a place was destroyed by volcani eruption.what organism could successfully colonize first
Which evolved first - organisms with complex body structures or those with simple body structures?
Complex organisms evolved from simple organisms, so simple organisms evolved first.
When did Multicellular organisms first appeared?
Multicellular organisms first appeared during the Vendian period.
Did unicellular or multicellular organisms evolve first?
Unicellular organisms evolved first; and from them evolved the multicellular organisms. But that leads onto another question as to why multicellular organisms evolved.
Who was the first person to do an experiment on how the first organisms were created?
The scientist Franceso Redi was the first scientist to infer how organisms have arisen.
How could you describe animals that are heterotophs?
Organisms that consume other organisms for energy.
What is the first thing live in this world?
Probably a form of bacteria. They evolved into multicellular organisms. Some evolved into plants because they could do photosynthesis
How many organisms were in the first food chain?
how many organisms are in the first food chain
What kinds of organisms were missing the first classification system?
Bacteria are the kinds of organisms that were missing from the first classification system.
What type of organisms first move into a area after primary disturbance?
Organisms that reproduce quickly
How unicellular organisms may have given rise to the first animals?
How unicellular organisms may have given rise to the first animals?
