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Which best explains why the first organisms on Earth were anaerobic?
Wiki User
∙ 11y ago
They thought this because the atmosphere contained very little oxygen.
Anaerobic means without oxygen and the early atmosphere of the Earth was very low in oxygen. Only those organism that could live without oxygen could survive. Those cells were cyanobacteria which are sometimes (incorrectly) called blue-green algae.
Wiki User
∙ 9y ago
Wiki User
∙ 11y agoSome scientists believe this because...
Anaerobic: because there was little to no oxygen available at the time
Heterotrophic: because they could not produce their own food and energy. Instead, they got their energy from nearby organic molecules
Prokaryotic: because prokaryotic cells can survive in extreme, harsh conditions which were present at that time. Modern day archaea are thought to be the closest relatives of Earth's early cells because they live in present-day extreme environments such as volcanic vents in the deep sea.
Wiki User
∙ 13y agoThere was no oxygen in early Earth's atmosphere.
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Would the first organisms be aerobic or anaerobic?
Yes. From our lectures, it was discussed that the first true cells were protozoans that lives anaerobically. Oxygen is literally a poison to them.
What type of organisms were the first living organisms on Earth?
blue green algae archebacteria
When did the first colonial organisms appear on earth?
1.4 billion years ago
Is a Cyanobacteria a aerobic or a anaerobic?
Cyanobacteria do not require oxygen. They are believed to have produced the first oxygen supply in the Earth's atmosphere, through the process of photosynthesis.
Were the first organisms that released oxygen as a by-product of photosynthesis?
No, they were not Toxic was actually poinsonous to the Anaerobic photoautotrophs. However cyanobacteria (a.k.a pondscum) is believed to be the first bacteria to give off oxygen as a by-product of photosynthetic processes.
Which types of organisms developed first due to the early environmental condition on earth?
spongesThey were prokaryotic and anaerobic organisms developed first due to the early environmental condition on earth.
Scientist think the first bacteria on earth were?
prokataryotic and autotrophic
Which came first anaerobic or aerobic?
Anaerobic came first, because there was no oxygen in the Earth's original atmosphere.
Was oxygen on Earth before or after life on Earth?
Elemental oxygen did not appear on Earth until some time after life did. In fact, the oxygen was produced by life carrying out photosynthesis. The first organisms on Earth were anaerobic, meaning their life processes did not involve oxygen. To most organisms like this, oxygen was highly toxic.
Is there a life that doesn't need oxygen?
Yes. There are organisms called anaerobic bacteria which do not need oxygen. To some organisms, called obligate anaerobes, oxygen is actually toxic. The first living things on Earth were obligate anaerobes.
What were the first three types of organisms?
different species of one-celled anaerobic bacteria
Why are there no multicellular anaerobic organisms?
I'm not sure how old this question is, but in fact three species multicellular anaerobic organisims were found in deep-sea sediments in April 2010. If you do a search for 'multicellular anaerobic organisms' you can see the details.
Would the first organisms be aerobic or anaerobic?
Yes. From our lectures, it was discussed that the first true cells were protozoans that lives anaerobically. Oxygen is literally a poison to them.
What type of organisms first appeared on earth?
Earth's first organisms were the Single- Celled organismsBacteriaFungiAnd Protozoa
Why do scientists think the first living cells to spear on earth were pobably anaerobic heterotrophs?
there was no oxygen in Earth's early atmosphere.
What were likely the first organisms on earth?
Bacteria.
The first eukaryotic organisms on earth were?
Protists
