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Did early producers change the atmosphere of the earth?
The Earth's atmosphere has gone through a number of changes in temperature and composition over the 4.5 billion years it has been around. From our point of view, the important change occurred when it became breathable by us (or other animals). That change almost killed everything else alive at the time since oxygen was poisonous to the first life forms on Earth. About 3 or 4 billion years ago, a bacteria-like life form discovered photosynthesis and gave off oxygen as a poisonous waste. This photosynthetic prokaryotic organisms that emitted O2 as a waste a precursor to what we now call blue-green alga. After more than a billion years of these bacteria-like things making oxygen, a life form evolved that was able to breath it. Soon after that, we arrived. Now that humans are hear, there are more temperature and chemistry changes to the atmosphere due to chemical we create that become pollutants and we are working on doubling the concentration of CO2 as a waste gas from burning coal and oil.
According to the modern scientific view how old is the Universe?
The scientific consensus has the age of the universe at between 13.6 to 13.8 billion years. Use the link below to read more.
What fraction of geological time have land plants been present on earth?
Approximately : land plants have been around for a half a billion years. The Earth for 4.5 billion years. So your answer is one ninth.
Did Charles Darwin propose to Emma Wedgwood?
No, he didn't get around to proposing because he was to evolved with his work.
How much waste is recycled each year?
around 10 billion pounds of waste is recycled each year as u can see that is much less than what goes into our oceans we need to save our oceans!
The first eukaryotic organisms on earth were?
The first eukaryotic organisms on earth were likely single-celled organisms such as protists, which are a diverse group of organisms that have a nucleus and other membrane-bound organelles. These organisms are thought to have evolved around 1.6-2.1 billion years ago.
What is The fossil record indicates that the first organisms?
The name of that thing was the "kevin". He is very rare and is only found in the equator.
Who was the first life on eath?
The first life on Earth were single-celled organisms such as bacteria that appeared around 3.5 billion years ago. These simple organisms evolved over time into more complex forms of life.
The time in which life first evolved on Earth was the?
eff the time in wich life first evolved on earth!!
When did life evolved on Earth?
It is generally believed that life first appeared sometime around 3.8 billion years ago. The first life forms were simple, single celled organisms with no nucleus. The first photosynthetic organisms were cyanobacteria, and the evolved about 3 billion years ago. Life first began a rapid amount of diversification during the Cambrian, a little more than 500 million years ago.
What comes between first eukaryotes and first terrestrial eukaryotes on a timeline?
The first eukaryotes were unicellular organisms that evolved around 2 billion years ago, followed by the first terrestrial eukaryotes that emerged around 1.6 billion years ago. Between these events, there were significant biological and environmental changes, including the development of multicellularity and adaptations for life on land.
When did the first life appear on earth?
The first life on Earth is estimated to have appeared around 3.5 to 4 billion years ago in the form of single-celled organisms. These early life forms evolved into more complex organisms over time.
What is the origin of bacteria?
Bacteria are believed to have originated on Earth around 3.5 billion years ago. They are thought to have evolved from simpler organisms like archaea and have since diversified into a wide range of forms inhabiting different environments.
When did complex organisms appear on Earth?
Complex organisms first appeared on Earth around 600 million years ago during the Ediacaran period. These early complex organisms, which were soft-bodied and lacked skeletons, were the precursors to the more familiar plants and animals that evolved later.
What came first to earth as things in the eras of the earth?
The first things to come to Earth were simple single-celled organisms around 3.8 billion years ago in the Precambrian era. These early life forms eventually evolved into more complex organisms over millions of years.
What life on Earth came first?
Microscopic single-celled organisms such as bacteria and archaea were likely the first forms of life on Earth, appearing around 3.5 billion years ago. These simple organisms eventually evolved into more complex life forms over millions of years.
What was the theory developed around the idea some eukaryotic organelles evolved from prokaryotic organisms?
endosymbiont
