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Is the idea of organic molecules being delivered to planets by comets part of the panspermia hypothesis?
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Possible certainly, there's no known reason why it should be impossible, but it's plausibility is essentially unmeasurable without a fully formed theory of abiogenesis to base a judgment upon.You would be speculating in a vacuum, essentially.
Answer
Yes. Panspermia is the hypothesis that life arrived on Earth from outer space, perhaps amid, perhaps, comet debris.
There are ancient legends that comets passing over are associated with increases of disease. Can microorganisms survive in space and travel to Earth on a meteorite or comet? One of the astronauts apparently sneezed on part of the rocket apparatus in 1969 while prancing around on the moon. Bacteria from the sneeze survived all the way back to Earth in the vaccuum of space and survived the boilingness of re-entry through Earth's atmosphere. The bacteria from the 1969 moonsneeze were revived.
The hypothesis of Panspermia does not answer how life began or where life began but does answer how life on Earthbegan. It is indeed plausible given the 1969 moonsneeze evidence. There are other ideas about origin of life on Earth itself such as the RNA world. The RNA world on another planet is also plausible, followed by meteoritic transport to Earth. Will we ever know which is utmostly correct?
A bit of correction to the above answer. When a technician was preparing a camera for one of the early unmanned moon landings he must have sneezed into the interior of the camera and then installed it on the spaceship, making no effort to sanitize the equipment. It was launched and stayed on the moon about 3 years. Then during one of the manned moon landings, an astronaut retrieved this camera essentially to see what 3 years of exposure to space had done to the unit. It was carried back to earth unopened inside the capsule which returned to earth and was not subjected to any of the reentry heat or pressures. When examined on earth it was found that the cold viruses that had been sneezed into the innards of the camera mechanism had survived the three years on the moon with no problems. They were intact and could have caused a cold to anyone handling those parts which were contaminated by the virus initially. This simply goes on to say that the potential for very small pieces of life causing DNA which is what viruses are, can survive the severity if space flight without much need for protection. Bacteria, which are true life forms, might not have been so lucky.
Other, more recent research, shows that although the outer surface temperatures of incoming meteorites is very hot for brief periods during the reentry flight the speed of these meteorites is not always as horrendous as most of us are of the opinion they are. One woman in Alabama in 1954 was laying on her couch when an 8.5 lbs 7 inch meteor crashed through her roof hit a radio and then bounced onto her hip. Although it caused a deep bruise, it was not so hot, or so fast as to have destroyed her hip on that left side. She went on to recover without much medical attention. This would imply that even bacteria carried inside such a rock might have been able to have survived the reentry too. The launch into space is conceived as happening when another small world not much different then earth or Mars where the initial impact sent debris flying at speeds faster then the escape velocity of that world. (25,000 MPH for earth). This would imply modest travel times from Mars to earth. but the reality is usually more like millions of years. Could this scenario imply panspermia? It is just not anything more then speculation with what we know today.
What else can I help you with?
One hypothesis about the origin of the building blocks for life is that they were?
delivered to Earth by comets or meteorites. These space rocks may have carried organic molecules that became the building blocks for life on Earth. This theory is known as panspermia.
What are proposed theories of how life came about on Earth?
Some proposed theories for the origin of life on Earth include the primordial soup theory, which suggests life arose from a combination of organic molecules in Earth's early oceans, and the panspermia hypothesis, which suggests that life may have been brought to Earth from elsewhere in the universe. The RNA world hypothesis proposes that RNA molecules were the first self-replicating molecules that eventually led to the development of more complex life forms.
What is the hypothesis for removing organic stain from a shirt?
The hypothesis for removing an organic stain from a shirt could be that applying a specific type of stain remover or detergent, combined with agitation and soaking, will effectively break down and remove the stain molecules from the fabric.
Describe the Four stages of the hypothesis for the origin of life on earth?
Abiotic synthesis of organic molecules: Simple organic molecules were formed from inorganic compounds under early Earth conditions. Polymerization: These organic molecules polymerized to form larger molecules like proteins and nucleic acids. Formation of protocells: These molecules self-assembled into protocells, which were the precursors to modern cells. Development of self-replicating molecules: Self-replicating molecules emerged within protocells, leading to the evolution of life on Earth.
What is the hypothesis that life developed from nonliving matter?
The hypothesis is known as abiogenesis, which proposes that life originated from nonliving matter through a gradual process of chemical evolution. It suggests that simple organic molecules gradually formed more complex structures, eventually leading to the emergence of self-replicating molecules and the first living organisms.
How did Oparin's hypothesis help Miller and Urey?
Oparin's hypothesis proposed that Earth's early atmosphere could have supported the formation of organic molecules, providing the foundational idea for Miller and Urey's experiment. Miller and Urey's experiment aimed to simulate early Earth conditions and demonstrated that organic molecules, including amino acids, could indeed be produced in a laboratory setting, supporting Oparin's hypothesis.
What is the four-stage hypothesis for the origin of life?
The four-stage hypothesis proposes that life began with the abiotic synthesis of small organic molecules, followed by the formation of polymers like RNA, then the packaging of these molecules into protocells, and finally the development of self-replicating molecules within these protocells, leading to the first living organisms.
Origin of life?
The origin of life is still a subject of scientific inquiry and debate. One prominent hypothesis suggests that life on Earth began with a primordial soup of organic molecules, which over time formed self-replicating molecular structures that eventually evolved into early life forms. Other theories propose that life might have originated from deep-sea hydrothermal vents or arrived on Earth through a process called panspermia.
What is the hypothesis of chlorophyll in plants?
The hypothesis regarding chlorophyll in plants is that it is the pigment responsible for capturing light energy during photosynthesis. This hypothesis suggests that chlorophyll absorbs light energy and converts it into chemical energy, which is used to produce glucose and other organic molecules in the process of photosynthesis.
How did life get on Earth and what are the prevailing theories about its origins?
Life on Earth is believed to have originated from simple organic molecules that formed in the early Earth's environment. The prevailing theories about the origins of life include the primordial soup theory, which suggests that life arose from a mixture of chemicals in the Earth's early oceans, and the panspermia theory, which proposes that life was brought to Earth from outer space. Other theories include the deep-sea vent theory and the RNA world hypothesis.
What did oparins hypothesis suggest that early earth atmosphere lack?
oxygen
Are lipids organic or inorganics?
Lipids are organic molecules that are naturally occurring and they are insoluble in water.
