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Richard87
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Assuming that all organisms came from a single original lifeform, wouldn't that mean that all organisms are cousins in one huge family?
Richard87 said:Assuming that all organisms came from a single original lifeform, wouldn't that mean that all organisms are cousins in one huge family?
zomgwtf said:I do not see why this assumption is necessary though... it's perfectly plausible that all lifeforms that have existed on Earth may have different branches if we go far enough back... making them completely unrelated to other organisms.
mgb_phys said:All three branches of life archaea, bacteria, and eukaryote have DNA.
For your hypothesis to be true, life would have had to evolve in all three independantly in exactly the same way to create DNA with the same structure 3 times.
It is possible that life did start several times and even that completely unrelated forms existed at the same time (and haven't left any fossil record) but the DNA cell won out and all life today descended from it
Yes, all organisms on Earth are related to each other through a common ancestor. This means that all living things share a common genetic code and have evolved from a single origin.
Scientists use various methods such as DNA sequencing, fossil records, and comparative anatomy to study the relationships between different organisms. By analyzing these data, they have been able to trace the evolutionary history and establish the relatedness of all living things.
Yes, humans are related to other organisms in the animal kingdom. We share a common ancestor with other primates such as chimpanzees and gorillas. We also share a common ancestor with all other living things, including plants, animals, and microorganisms.
There is no scientific evidence to suggest that there are exceptions to the theory of common ancestry. All living things, from bacteria to plants to animals, share a common genetic code and have evolved from a single origin. This theory is supported by a vast amount of evidence from various fields of biology.
Yes, organisms from different kingdoms can be related. For example, humans are related to plants through a common ancestor, despite belonging to different kingdoms (Animalia and Plantae). This is because all living things are related through a common evolutionary history, regardless of their taxonomic classification.