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Bugs born from dew drops on the leaves

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The Silphium plant sprouts  from the bare ground

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Mice, toads and cells can be created from water, air, or decaying matter.

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His hypothesis was supported when maggots developed in the uncovered jars, but no maggots appeared in either the gauze-covered or the tightly sealed jars. He concluded that maggots could only form when flies were allowed to lay eggs in the meat, and that the maggots were the offspring of flies, not the product of

spontaneous generation

.

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Heated but sealed flasks remained clear, without any signs of spontaneous growth, unless the flasks were subsequently opened to the air. This suggested that microbes were introduced into these flasks from the air.

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Pasteur created a number of long, twisted-neck flasks, in which he sterilized soup by boiling it. His invention avoided the entrance of any airborne microbes, which would get stuck in the bends and twists of the flasks' necks, while yet allowing the interchange of air from the inside with air from the outside. If microbial development in the sterilized flasks was caused by something other than airborne microorganisms, it would have access to the broth but the bacteria would not. He was right to assume that the sterilized broth in his swan-neck flasks would continue to be sterile as long as the swan necks were still attached. However, if the necks were broken, bacteria would be released, contaminating the flasks and enabling microbial growth inside the containers.

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The Miller-Urey experiment was a simulation of conditions on the early Earth testing the idea that life, or more specifically organic molecules, could have formed by nothing more than simple chemical reactions.

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Assembly of carbon compounds into polymers-1953

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Assembly of carbon compounds into polymers-1953

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The assembly of  carbon compounds into polymers requires a source of energy.

A possible site for the origin of the first carbon compounds is around deep-sea vents. These are cracks in the Earth's surface, characterized by gushing hot water carrying reduced inorganic chemicals such as iron sulphide. These chemicals represent readily accessible supplies of energy.

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The production of Carbon compounds like sugars and amino acids-1961

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The production of Carbon compounds like sugars and amino acids-1961

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Scientists passed vapor through a mix of     Methane (CH4), Hydrogen (H2) and Ammonia (NH3), to represent atmospheric gases from the beginnings of the earth.  They used electric discharges as a source of energy. Amino acids were formed and other carbon compounds necessary for life.    Amino acids are the basic units of proteins.

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Development of a mechanism for inheritance-1968

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Development of a mechanism for inheritance-1968

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It is known as:

Living organisms are made up of genes made of DNA and with enzymes as catalysts.

Enzymes are required to be able to replicate DNA and pass it on to descendants.

Enzymes require genes in order to form.

The solution to this riddle could be the next hypothesis

In the early  phases of evolution…the RNA was the genetic material, and it could keep the same information as the actual DNA does.

The ARN could auto replicate and also could act as an enzyme (catalyzer).

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sustains that:

The mitochondrion  was a free prokaryote that developed the respiration process.

The mitochondrion where “eaten” by prokaryotes thru the process of endocytosis and instead of digesting them, they live inside their hostage cytoplasm.

The mitochondrion and the prokaryote organism had a symbiotic relationship helped by each other (mutualism).

The natural selection favored this kind of cells.

This theory also explains the formation of chloroplasts.

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If phospholipids or other amphipathic carbon compounds were among the first carbon compounds, they would have naturally assembled into bilayers. Experiments have shown that these bilayers readily form vesicles resembling the plasma membrane of a small cell. This would have allowed different internal chemistry from that of the surroundings to develop.

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-Allot, A & Mindorff, D. (2014). Biology Course Companion. United Kingdom: Oxford University press.

Editions SM.SM .(2012) .
-Libretexts. (2022). 3.1: Spontaneous Generation. Biology LibreTexts. https://bio.libretexts.org/Bookshelves/Microbiology/Microbiology_(OpenStax)/03%3A_The_Cell/3.01%3A_Spontaneous_Generation