Question
At first, there were only two domains that are classified based on the presence of nucleus of the cells of the organisms. One is the domain eukarya with nucleus on the cells of the microorganisms. The other one is the prokarya with no nucleus on their cells. Scientists divided the two domain prokarya into two. What are those and what is the reason of dividing it into two domains if they have both have the characteristics such as the absence of cell nucleus?
-OTLDA
At first, there were only two domains that are classified based on the presence of nucleus of the cells of the organisms. One is the domain eukarya with nucleus on the cells of the microorganisms. The other one is the prokarya with no nucleus on their cells. Scientists divided the two domain prokarya into two. What are those and what is the reason of dividing it into two domains if they have both have the characteristics such as the absence of cell nucleus?
-OTLDA
Answers & Comments
Answer:
The Earth is 4.6 billion years old and microbial life is thought to have first appeared between 3.8 and 3.9 billion years ago; in fact, 80% of Earth's history was exclusively microbial life. Microbial life is still the dominant life form on Earth. It has been estimated that the total number of microbial cells on Earth on the order of 2.5 X 1030 cells, making it the major fraction of biomass on the planet.
Explanation:
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