Explain your answer. Pterosaurs are
more closely related to crocodilians
. They share a more recent common ancestor than do pterosaurs and turtles. … The DNA of crocodilians should be more similar to the DNA of modern birds.
turtles are more closely related to
mammals than to birds
. a. TRUE because turtles share common ancestor W with mammals.
Having recently looked at more than a thousand of the least-changed regions in the genomes of turtles and their closest relatives, biologists have confirmed that turtles are most closely related to
crocodilians and birds
rather than to lizards, snakes, and tuataras.
According to California Academy of Sciences and Cal State Fullerton researchers, turtles are
more closely related to birds, crocodiles, and dinosaurs than snakes and lizards
..
Did birds evolve from the gliding reptiles called pterosaurs explain your reasoning?
Did birds evolve from the gliding reptiles called pterosaurs? Explain your reasoning.
No, birds did not evolve from pterosaurs because they split off from reptiles into different branches
that do not cross.
Are turtles dinosaurs?
Turtles are related to dinosaurs
, and the latest genetic studies suggest turtles share the same ancestor. The earliest turtles existed together with the dinosaurs millions of years ago. … Descendants of ancient turtles are still present today, with most of them being species of sea turtles.
Which taxon is ancestral to all others?
The least related taxon in a tree is called the outgroup of that phylogeny, and it often included because it has contrasting characteristics relative to the other included taxa. A group of taxa that includes a common ancestor and all of its descendants is called
a monophyletic group, or a clade
.
Summary: Having recently looked at more than a thousand of the least-changed regions in the genomes of turtles and their closest relatives, biologists have confirmed that turtles are most closely related to
crocodilians and birds
rather than to lizards, snakes, and tuataras.
Instead, authors place turtles in the newly named group “Archelosauria” with their closest relatives:
birds, crocodiles, and dinosaurs
.
What are turtles closest relatives?
Most genetic studies over the past 20 years have positioned
crocodilians, dinosaurs and modern birds
as the turtles' closest evolutionary relatives. But some studies looking at DNA or RNA, as well as analyses of turtle anatomy, have pointed to lizards and snakes as the group's closest relatives.
It has been argued that feathers are unique and only evolved in birds; hence making
modern birds
the closest relatives of Archaeopteryx.
Would you expect the DNA of crocodilians to be more similar to the DNA of modern birds or the DNA of turtles Why?
All three species have similar DNA
because they came from a common ancestor
. … The DNA of crocodilians should be more similar to the DNA of modern birds. The diagram indicates that the common ancestor of crocodilians and modern birds was more recent than the common ancestor of crocodilians and turtles.
What type of evidence for evolution is provided by the fossil record?
Fossils are
the preserved remains or traces of animals, plants, and other organisms from the past
. Fossils are important evidence for evolution because they show that life on earth was once different from life found on earth today.
Are there any dinosaurs alive today?
Other than birds, however,
there is no scientific evidence that any dinosaurs
, such as Tyrannosaurus, Velociraptor, Apatosaurus, Stegosaurus, or Triceratops, are still alive. These, and all other non-avian dinosaurs became extinct at least 65 million years ago at the end of the Cretaceous Period.
Are sharks older than dinosaurs?
Sharks are among Earth's most ancient creatures. First evolving over 455 million years ago, sharks are
far more ancient than the first dinosaurs
, insects, mammals or even trees.
What is the biggest turtle that ever lived?
Archelon
is an extinct marine turtle
