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Although its a paradox to believe anything beyond the time of known history evidence suggests that life started in water like habitats. But the organisms radically changed the planets water habitats so much that those early habitats no longer exist. Evidence is based on sampling the current environment and suggesting the theory now commonly accepted as the description of prehistory.
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∙ 13y ago
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What caused a major change in the composition of Earths atmosphere?
The appearance of photosynthetic organisms
Earths early atmosphere was changed dramatically by the evolution of?
photosynthesis
How are living organisms dependenyton the soi are organisms that live in water totally independent of soil as a resource?
How are living organisms dependent on the soil? are organisms that live in water totally independent of soil as a resource?
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.
In which layer do organisms on Earth live?
biosphere
How did earths early organisms obtain food?
That organisms have many lifes substances that could involved how many they will actually have in common in scintifice will hav more.
What are Single celled organisms with rigid silica cell walls in many different shapes?
These organisms live in the sea, they are photosynthesising algae and are part of the Earths Phytoplankton. They are called "Diatoms".
What kind of organisms live in earths most extreme environment and may provide scientsts with clues about possible life forms on other planets?
Extremophiles
What is Earths biosphere is?
living organisms - study island answer (:
What organisms produce about half of the earths oxygen?
trees
What gas was lacking from earths early atmosphere in the early precambrian?
oxygen
Was there oxygen in the early earths atmosphere?
yes
What factor contributed to the formation of earths early atmosphere?
energy from the sun,lightening,earths heat triggered chemical reaction for the early gases of the earth combined
What caused a major change in the composition of Earths atmosphere?
The appearance of photosynthetic organisms
What gas was not part of early earths atmosphere?
oxygen
What gas was not a part of earths early atmosphere?
nitrogen
What percentage of earths water is fresh water available for use by living organisms?
three percent of all the earths water is fresh water
