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a sturdy-finned, shallow-water lobe-fin whose appendages had skeletal supports similar to those of terrestrial vertebrates
A Class of lobe-finned fishes known as Sarcopterygians is believed to have given rise to the amphibians and thence to all other air-breathing vertebrates. There are three main Subclasses -- the Rhipidistii, the Dipnoi, and the Actinistia or Coelocanths. The Rhipidistians are the ones that are ancestral to tetrapods. The oldest known amphibians have been found in rocks of the late Ordovicean Period.
The Dipnoi are today's lung fishes -- the African, Australian, and South American. The African and South American types are similar in many ways and are probably fairly closely related. The Australian is quite different and is the only one of them that is capable of using its gills as well as its lung for gas exchange.
The Coelocanths were thought to be extinct until the late 1930's when one was discovered in the ocean off the east coast of South Africa.
What else can I help you with?
Almost all living organisms use DNA ATP and the same DNA triplet code this is an example of evolution based on what?
Common ancestry. In this case the last universal common ancestor, LUCA.
Which terms is associated with the single-celled ancestor theory?
The term associated with the single-celled ancestor theory is "Last Universal Common Ancestor" (LUCA). This theory postulates that all living organisms on Earth trace back to a single-celled organism from which all life evolved.
Which living organism most resemble the common ancestor of all life according to genetic testing?
Microorganisms called archaea are believed to be the group of living organisms most closely related to the common ancestor of all life based on genetic testing and evolutionary studies. This is due to their unique genetic and biochemical characteristics that overlap with the early stages of life on Earth.
Do ll living organisms share a common ancestor?
Yes, all living organisms are believed to share a common ancestor, a concept supported by the theory of evolution. This idea suggests that through the process of natural selection and genetic variation over billions of years, diverse forms of life have evolved from a single or a few ancestral species. Molecular and genetic evidence further strengthens this notion, showing shared DNA sequences among various organisms. This common ancestry highlights the interconnectedness of all life on Earth.
What best describes the theroy of evolution?
The theory of evolution explains how species change over time through natural selection, genetic variation, and adaptation to their environment. It is supported by evidence from various fields, such as paleontology, genetics, and biogeography, and is considered the central organizing principle of biology.
What is our evidence of Luca, the common ancestor that we can link all living organisms to?
Scientists have identified Luca as the Last Universal Common Ancestor, or the common ancestor of all living organisms. Evidence for Luca comes from the study of genetic material and the similarities found in the genetic code of different species.
Who was it that proposed that all living things came from a common ancestor?
Charles Darwin
Do all living things have a common ancester?
Yes. Go far enough back and we can posit a universal common ancestor.
What is ramaphitecus?
The common ancestor of Homo with the other living Great Apes must be even older.
Are birds most recent common ancestor to dinosaurs?
They are generally considered to be the closest living relatives.
What are clades A clade is a group of organisms consisting of a common ancestor and all its descendants But doesn't every living thing have a common ancestor Please help Thanks?
Yes, all living things are just groups of organisms consisting of common ancestors and all their decendant's. Clades is just a word that means a group of organisms.
What are connected to cheetahs?
The cougar is the closest living relative of the cheetah. They both evolved in North America from a common ancestor.
What is the phenomenon called when the similarity of the characteristics of sheep and reindeer is due to their having a common ancestor?
The similarity of sheep and reindeer is due to parallel evolution. This is when two species have a common ancestor and have developed similar traits, despite living in different areas.
What is the name of the first living thing on earth?
There is no particular name for it, since we do not know exactly what that organism was. We do, however, have a general name LUCA, which stands for Last Universal Common Ancestor, meaning the last living thing that was the ancestor of all life on Earth.
Are puffer fish and sea urchins related to each other?
Yes. Due to evolution, all living things have a common ancestor.
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.
Is a microorganism considered an animal?
Some microorganisms are animals some are not. For example bacteria are not animals but are microscopic while mites can be microscopic but are animals. Microoranism is defined by needing a microscope to see it. Living things are considered animals by virtue of being on a specific branch of the tree of life having a common ancestor.
