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The first organisms evolved on Earth around 4 billion years ago The fossil record indicates that the first organisms were?
Wiki User
∙ 13y ago
a. marine invertebrates
b.land plants
c.reptiles
d.prokaryotes
Wiki User
∙ 12y ago
Wiki User
∙ 13y agoprokaryotes
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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.
How many inches around the world?
You have to go about 1,578,044,160 inches to go around the world once.
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.
Did Charles Darwin propose to Emma Wedgwood?
No, he didn't get around to proposing because he was to evolved with his work.
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.
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 was the theory developed around the idea some eukaryotic organelles evolved from prokaryotic organisms?
endosymbiont
Which event contributed most directly to the evidence of aerobic organism?
The development of photosynthesis in primitive organisms, specifically cyanobacteria, contributed most directly to the evidence of aerobic organisms. Photosynthesis evolved around 3 billion years ago, producing oxygen as a byproduct. This oxygen accumulation in the atmosphere eventually allowed for the development of aerobic organisms, which rely on oxygen for their metabolism.
What theory was developed around the idea that some eukaryote organelles evolved from prokaryotics organisms?
endosymbiont
What was the first organism evolved on earth around 4 billion years ago?
Single cell prokaryotes first appeared perhaps 3.8 billion years ago.
When did life first evolve 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 organisms appeared first in earths history?
The first organisms on Earth were likely simple single-celled prokaryotes, such as bacteria and archaea, that appeared around 3.5 billion years ago. These early organisms were anaerobic, meaning they did not require oxygen to survive. These primitive life forms eventually evolved into more complex organisms over millions of years.
Did animal appear first or did plant appear first?
Scientists believe that animals evolved from single-celled organisms in the oceans around 600 million years ago, making them the first to appear. Plants, on the other hand, evolved from ancient algae and appeared on land around 450 million years ago.
How did eubacteria evolve?
Eubacteria is apart of the Monera group that appeared about 3. 8 billion years ago. They are some of the oldest organisms on the Earth and have evolved in the way that they obtain food.
How long has sex been around?
Sexual reproduction has been around for more than 1.2 billion years, with primitive forms of sexual behavior observed in early single-celled organisms. The concept of sex as we know it today has evolved over time through natural selection and genetic variation.
What process evolved around 2.3 billion years ago that introduced significant amounts of free oxygen to the atmosphere?
water-based photosynthesis
What did the kingdom animals evolve from?
Animals in the kingdom Animalia evolved from simple multicellular organisms around 600 million years ago. Their evolutionary path can be traced back to a common ancestor shared with other multicellular organisms like sponges and jellyfish.
