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prokaryotic cells
prokaryotic cells were probably first on earth
Wiki User
∙ 12y ago
Wiki User
∙ 10y agocyanobacteria was the first bacteria, which probably led to new chemicals forming.
Wiki User
∙ 12y agoThe first cells were made up of carbon dioxide, water and nitrogen.
Wiki User
∙ 11y agoSame molecules that are here now. Law of Conservation of Mass and Energy.
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Organic compounds will not form in the Miller-Urey apparatus if O2 is present Why is this not?
because oxygen was not present in the early earth.
What 2 places on early earth could organic molecules been synthesized?
Two hypotheses about the source of organic molecules on Earth would be, first, that they formed out of the original chemical composition of the planet, because of the energy provided by solar radiation and lightning, and second, that they were already present in interstellar dust clouds and therefore were part of the original composition of the Earth when it condensed out of an interstellar dust cloud.
What was not in the air on earth 3.6 billion years ago?
Oxygen was not present in large amounts in the early atmosphere of Earth.
Why is there no gas pressure inside a vacuum?
Gas pressure is caused by the molecules of gas striking the walls of a container, or in the case of Earth's atmosphere, the molecules of air hitting the earth. In a vacuum, there are no gas molecules. No molecules, no pressure.
What are ways Earth absorb UV rays?
The UV radiations coming from the sun are absorbed by the layer of ozone molecules present in the stratospheric region of atmosphere. This layer is known as ozone layer.
Which of the following gases was NOT present in Earth's early atmosphere?
Hoyaaa
Did the primitive Earth have oxygen?
No. Oxygen is not believed to have been present in the early years of Earth's history.
What is the Earts ozone layer?
Earth's ozone layer is the layer of ozone molecules surrounding the earth. it is present in the stratospheric region of the atmosphere.
Which of earth's early sources of heat are not major contributors to earth's present-day internal energy?
The sun
Where could Earth's early organic molecules have been synthesized?
In the atmosphere, in the upper layers of waters, basically everywhere where there's enough of the component elements, energy and convection available.Note that recent observations in astronomy have shown massive amounts of organic molecules to be present about newly formed star systems, so it's very well possible that some organic molecules were transported to Earth by comets, etc.
Organic compounds will not form in the Miller-Urey apparatus if O2 is present Why is this not?
because oxygen was not present in the early earth.
What was the purpose of the Miller and Urey experiment?
To see if biological compounds could form spontaneously on early Earth To see if simple molecules can combine spontaneously. To find out how biological molecules could have first formed How life can evolve from nonliving matter
What are three major scientific inferences about the first living cells on earth?
photosynthesis, chemosynthesis, and aerobic respiration1. Little or no oxygen was present on early Earth; 2. Oldest fossils are thought to be cells of living prokaryotes 3. the first cells might have developed in an enviorment filled wit molecules for food
What did Stanley do?
Miller took molecules which were believed to represent the major components of the early Earth's atmosphere and put them into a closed system .
What are the molecules on earth?
Molecules are made from combinations of the basic elements. There are tens of thousands of different molecules on earth.
In their laboratory simulations of the early Earth Miller and Urey observed the abiotic synthesis of which molecules?
There are four molecules that are found in the 1st Miller Urey experiment. The four molecules that were found were hydrogen, steam, methane and ammonia.
Who conducted the experiment to prove that simple organic molecules could be formed by conditions found early in Earth's history?
Miller and Urey
