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The last universal common ancestor (or LUCA) for all known life would have been some single celled organism similar to prokaryotes. It might have been an RNA or DNA based organism, but it would have used more or less the same genetic code as all modern organisms (with a few minor variations) today. It will probably have lacked a true cellular nucleus, and many of the organelles that modern organisms have, but it would still have used ATP as a key factor in its metabolism.
Note that, like with all Most Recent Common Ancestors for any group, it is not necessary that a single species of organism is the sole ancestor for all modern life. It may well be possible that different species contributed to modern life (see also: multiple origins hypotheses). There will be one single ancestor common to any specific set of traits in all the diverging lineages, but, depending on the set of traits examined, they may lead to different origins. Compare, for instance, to mt-DNA Eve and Y-chromosome Adam: there is one most recent common ancestor for all surviving variations of mitochondrial DNA via matrilineal descent, but there is a different ancestor, living in a different era, for all variant Y-chromosomes surviving through patrilinial descent. It is, however, likely that there was, at some time, indeed one single species or closely linked collection of species of organisms from which all modern life descends. Also note that LUCA concerns only the most recent of such ancestral organisms: it itself would have had ancestors, and shared ancestors with other lineages existing at the time.
What else can I help you with?
What common ancestor do two or more descendants share?
The common ancestor that two or more descendants share is a shared ancestor from whom they both or all descend.
The fact that all organisms have DNA as their genetic material is evidence that?
all organisms share a common evolutionary ancestry. The universal presence of DNA suggests a common genetic code that has been inherited from a common ancestor. This supports the theory of evolution and the idea that all living things are connected through a shared genetic history.
The highlighted grouping in the cladogram is a grouping?
A monophyletic group, or a clade, where all members share a common ancestor and include all its descendants.
What was LUCA in biology?
LUCA stands for Last Universal Common Ancestor. It is a hypothetical organism that is considered to be the most recent common ancestor of all life on Earth. LUCA is believed to have existed billions of years ago and is the origin of the tree of life.
Why do most scientist believe that all life on earth evolved from a single-felled ancestor?
Scientists believe in the theory of universal common descent because it provides a coherent explanation for the diversity of life on Earth. Evidence from various fields such as genetics, biochemistry, and the fossil record supports the idea that all living organisms share a common ancestor. Additionally, the theory has successfully predicted and explained many observations in the biological world.
Do birds and reptiles share a common ancestor?
Yes. If you go back far enough, all life on Earth shares a common ancestor.
What common ancestor do two or more descendants share?
The common ancestor that two or more descendants share is a shared ancestor from whom they both or all descend.
What relationship is your second cousin's first cousin to you?
It will depend on whether or not you share a common ancestor. They could also be second cousins, if you all share a Great Grandparent. If you do not share a common ancestor, there is no relationship between you.
The fact that all organisms have DNA as their genetic material is evidence that?
all organisms share a common evolutionary ancestry. The universal presence of DNA suggests a common genetic code that has been inherited from a common ancestor. This supports the theory of evolution and the idea that all living things are connected through a shared genetic history.
What supports the scientific theory that all species share a common ancestor?
Evolution.
What is your relationship to your wife's cousin?
You are not related at all. The two of you do not share a common ancestor.
What is a group of species that includes a single common ancestor and all descendents?
Unless life evolved multiple times on Earth all species share a common ancestor with each other. The list is for all practical purposes limitless. Humans and wolves Guinee Pigs and Wales Cock Roaches and Mice and so on.....
What are you to your aunts mother in law?
You could be their grandchild. Or you may not be related at all, as not sharing a common ancestor.
What was LU-CA?
LUCA stands for Last Universal Common Ancestor, the last organism that is the common ancestor of all life on Earth.
What relationship would your aunts step granddaughter be to you?
No relationship at all, you don't share a common ancestor.
What is the common ancestor of the leopard and cheetah?
A bobcat is a specie of lynx, which is a member of the family Felidae or cat family.
What are species that share a common ancestor?
Answer 1tigers and lions.Answer 2Tigers and lions share the Saber toothed tiger. You can see that there are no improvements from the Saber Toothed Tiger. There is only genetic losses along the path that leads to eventual extinction.The Tiger is nearly extinct. Lions are nearly extinct. There are 1.5 million species believed to be extinct and 47000 now on the list including 1 in 4 mammals.There is only extinction as the end result of genetic degradation leading to extinction. There is no evolution.Answer 3Modern humans and Neanderthals shared a common ancestor. Humans and chimpanzees share a more remote common ancestor. Humans and bonobos yet a more remote common ancestor. Horses and zebras share a fairly recent common ancestor, compared to the ancestor shared by horses and rhinoceroses. Basically, all known lifeforms have in their genomes evidence of a shared ancestry, suggesting that all the wide variety of modern life stems from a very limited number of early organisms.
