A billion years ago, there seems to have been three types of biological cells: 1) possibility filamentous fungi, as indicated by fossil evidence of long streaks; 2) cyanobacteria, as plant-like cells in polluted water evolving photosynthesis; and 3) stromatolites, as mounds of bacteria-like cells, which are unfathomable.

As the cyanobacteria evolved in polluted water, producing photosynthesis, some bacteria evolved around them feeding off the cell debris. They were vibrios. They hardly differed from the vibrio bacteria of now days. They would have came out of the stromatolites to exploit the nutrients produced by cyanobacteria.

Vibrios vibrate using small, hair-like flagella on their surface called peritrichous flagella. They needed a small amount of motion to gather nutrients in the polluted water. Such vibrio bacteria still exist with approximately the same characteristics, the most noted being Vibrio cholerae, which exists in polluted water and creates the disease, cholera.

There would of course have been places where there was some cleaner water near the polluted water; and then the vibrios would have needed to get around better to cover more distance. So they evolved long, screw-like flagella on one end for rapid locomotion. The result was Pseudomonas fluorescens.

Over the past 700-800 million years, P. fluorescens has changed little beyond becoming more physiologically complex, while it gave us animal life and much of agriculture. It is the most common, simple-celled bacteria in the soil, the most common bacteria in fresh water and the most common bacterium that blows in the air, because it has been adapting to various environments far longer than any other bacterium.

The reason why it has that name is because it produces a fluorescent blue-green pigment that is water soluble when growing in water. The pigment attracts insects which pick up the bacterium on their feet and carry it around.

Any bacterium would die for a pigment for attracting insects to carry it around; but very few bacteria can afford such a luxury. P. fluorescens produces two pigments. In addition to the blue-green pigment, it produces a pink pigment in a high-nutrient, non-aqueous environment.

P. fluorescens tolerates drying, which allows it to blow in the air like mold spores. Bacteria do not generally blow in the air. It took the extreme adaptability of P. fluorescens to adapt to the drying and transmission through the air.

Before animals could exist, modern respiration was needed to provide ATP as energy for motion, rapidly and in large quantities. There were two very demanding mechanism required for modern respiration. One was circular motion for moving reactants into place and the ATP out of the way. The other was the porphyrin ring, which creates a very high efficiency ATP production in the area of 95% or higher energy utilization.

The required circular motion was evolved in P. fluorescens. To move rapidly through water, P. fluorescens has two polar flagella that rotate like cork screws. It used about eighteen proteins for that. That mechanism was then converted into circular motion for moving ATP components into place, which uses about twenty proteins. That means P. fluorescens would have used the same rotating proteins for its rotating flagella and for the large amount of ATP needed for the motion.

Those rotating proteins could not evolve in other types of cells, because cytoplasmic activity cannot be disrupted that much. The inside of cells is like thousands of assembly lines packed together. Reactants must move from one enzyme to another without diffusing around. Any disturbance creates too much cellular chaos, which greatly reduces evolution of physiology. But the rotating proteins of P. fluorescens were located within the cell wall, which was out of the way of the cytoplasmic activities.

The porphyrin ring that is used in modern respiration would have evolved in the cyanobacteria. It was needed for photosynthesis. Only cyanobacteria were available for that process of evolution, which would have taken about a billion years to evolve.

The porphyrin ring would then have been transferred through "horizontal gene transfer" to P. fluorescens. That gene transfer process means other microbes carry genes into other types of cells. P. fluorescens needed the porphyrin ring for producing ATP for motion.

Could P. fluorescens have produced ATP for motion without the porphyrin ring and then the porphyrin ring added to the process someplace else? Probably not, because P. fluorescens would have needed a lot of ATP to be produced rapidly for its type of motion. And there were no othere types of cells for modern respiration to evolve in. The vibrio types of bacteria did not need a lot of ATP for their vibratory motion.

Animal motion began at about the same time as the "Cambrian explosion of life" 539 million years ago. So was there a direct relationship, or was it coincidence? It would have been coincidence, because the Cambrian explosion involved a lot more than animal motion.

Of course, animal motion picked up modern respiration through mitochondria, which would have originated as a bacterium. That bacterium would have been a close offshoot of P. fluorescens, because there weren't other types of bacteria around at that time.

Escherichia coli evolved in the intestines of animals to breakdown genetic material which is not used as a nutrient by animals. There is no evidence of what bacteria might have existed between P. fluorescens and E. coli.

The cause of the Cambrian explosion of life is a total mystery to biologist, because the causative factor has been erased by incompetent physicists. It was the explosion of a planet between Mars and Jupiter. Scientists have known for hundreds of years that the asteroid belt was caused by a planet exploding; but as incompetent corrupters acquired more and more power over the social structures, they reversed a lot of scientific knowledge for the same reason they contrived relativity in physics—to reduce science to a power structure for worshipping incompetents while trying to eliminate rationality from human existence.

The exploding planet added critical minerals to the oceans and clay to the surface of the Earth. Minerals had mostly been precipitated out of the oceans along with calcium compounds which have low solubility. Adding back those minerals was necessary for animal evolution, because the demanding physiology of motion requires a lot of mineral cofactors for the enzymes.

Plants avoid minerals in their evolution to every extent possible, because their habitats would be limited by absence of required minerals. Without motion, plants are chemical factories which produce unusual and complex compounds through complex pathways which do not require mineral cofactors with enzymes.

Plants could not grow on the surface of the Earth before the planet exploded, because there was no clay at that time, just shale. Large amounts of shale were embedded into the surface of the Earth at its beginning, but no clay. The difference between shale and clay is structural, not chemical. No one knows why. It means the clay either was formed on the planet that exploded, or more likely, the minerals aggregated into clay while precipitating in the gaseous atmosphere of the Earth.

There is no clay on the Earth beyond the top few inches of the Earth's surface, except where it was ground in through glaciers or eroded. That distribution of clay could only have occurred as a result of the clay falling onto the surface after everything else was in place.