When did the first living organisms live on earth?

Answer The first living organisms lived during what is known as the Archean Eon, between about 2.5 and 4 billion years ago, according to the Smithsonian Institution. While there is no precise date for the... Read More »

Top Q&A For: When did the first living organisms live on earth

What was the earliest known group of living organisms on Earth?

It is impossible to determine absolutely the earliest living organisms using today's scientific techniques. Although most scientists agree that the Archaea, simple bacteria-like organisms, were the... Read More »

How many species of organisms live on the earth today?

Science has identified over two million species of organisms. Estimates project that there are nearly fifty times that many waiting to be discovered, which means that there could possibly be 100 mi... Read More »

Why are viruses not living organisms?

Viruses are similar to single-celled organisms in structure, but means of reproduction differentiate the two and indicate that viruses are not living organisms.CellsAll living organisms are formed ... Read More »

What Are the Three Domains of Living Organisms?

Science has a habit of attempting to classify everything into categories. One of these classification systems is known as the Three Domains. All of the biological organisms on the planet Earth are ... Read More »