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It's a complicated answer. Every living organism on the planet can trace its roots all the way back to one organism -primitive precambrian bacteria. A colony of bacteria was probably separated into two colonies which were then isolated. Both groups were probably faced with different environmental challenges. Only the bacteria with the adaptations that kept them from dying survived long enough to split themselves and reproduce. That's how evolution works. Every time a group of organisms is isolated and each one is relocated in has different environmental factors, only the ones with the right stuff will make it. Eventually the separate groups will evolve into completely different species as their helpful adaptations are amplified through the generations, but the original group from which they both came is their common ancestor. I'm not sure if I explained that clearly enough, but that is how different organisms share a common ancestor.
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Many related organisms are found to have the same enzymes and hormones This suggests that?
That they all had a common ancestor.
Homologous structures in organisms suggest that the organisms?
common ancestor
What does the presence of Similar genes in very dissimilar organisms imply?
Common ancestor, or convergent evolution to the same function
Why do DNA comparisons provide the most direct evidence of evolutionary relationships?
IT is believed that everyone has the same ancestor
How can you use classification to tell how closely organisms are related?
Scientists mainly compare similarities and differences in what the organisms look like. With the less obvious relations, they analyze their DNA. The goal is to find a common ancestor between the two organisms. The more recently that ancestor existed, the more closely related the organisms are.
What does it mean for species to have an evolutionary relationship?
If two organisms share an evolutionary relationship, that means that they have a common ancestor on the evolutionary tree. The more recently the shared common ancestor lived, the more closely related the two present organisms are, evolutionarily.
Many related organisms are found to have the same enzymes and hormones This suggests that?
That they all had a common ancestor.
Did all the people in the world came from a same ancestor?
yes the did how do you think other organisms start to exist
Homologous structures in organisms suggest that the organisms?
common ancestor
What does the presence of Similar genes in very dissimilar organisms imply?
Common ancestor, or convergent evolution to the same function
Which organisms have possible common ancestor?
All of them
What are Descendant organisms?
Descendant organisms are organisms that share many in common because they share a common ancestor.
What does the FOXP2 gene in mammals tell us about evolutionary relationships?
That those organisms that posses this gene have the same common ancestor that they all branched from and developed from.
Why do DNA comparisons provide the most direct evidence of evolutionary relationships?
IT is believed that everyone has the same ancestor
What is the definition of ancestral trait?
An ancestral trait is a trait that is shared by a group of organisms and their common ancestor. It is a characteristic that has been inherited from a common ancestor and has been passed down through generations without change.
The fact that all organisms have DNA as their genetic material is evidence that?
We all current life has a single common ancestor.
Explain the evolutionary significance of a nearly universal genetic code?
It is considered universal because all organisms use the same codon for the same amino acid.
