[DOC] [TLE] Evolution of fish - Wikipedia [PAR] The evolution of fish began about 530 million years ago during the Cambrian 
explosion. Early fish from the fossil record are represented by a group of small, 
jawless, armoured fish known as ... The first ancestors of fish, or animals that 
were probably closely related to fish, were Pikaia, Haikouichthys and 
Myllokunmingia. [DOC] [TLE] Timeline: The evolution of life | New Scientist [PAR] Jul 14, 2009 ... The oldest fossils of single-celled organisms date from this time. ... Around 20 
million years later, a small group called the placozoa ... Strange life forms known 
as the Ediacarans appear around this time and ... (animals without backbones), a 
split that occurred around this time. ... 500 million years ago. [DOC] [TLE] Fossil Animals - The Canadian Encyclopedia [PAR] The first animals were microscopic in size and left no known fossil remains. ... By 
500 million years ago, primitive jointed-legged animals (eg, TRILOBITES) were 
abundant ... containing large, shallow marine shellfish is dated at 380 million 
years old. ... specimens of about 2 dozen species of lungfish and lobe-finned 
FISHES. [DOC] [TLE] What does the fossil record show? - BioLogos [PAR] At 500 million years ago, ancient fish without jawbones surface; and at 400 
million years ... Fossils of land animals, or tetrapods, first appear in rocks that are 
about 370 ... But in 1998, scientists found a fossilized fin, 370 million years old, 
with eight ... One group of reptiles, the cynodonts, first appeared about 260 
million years... [DOC] [TLE] The Origin of Vertebrates | Answers in Genesis [PAR] Apr 19, 2007 ... According to evolutionists, after the first fishes had evolved, they ... The presence 
of pharyngeal pouches, a post-anal tail, and a backbone in all vertebrate 
embryos shows they ... Reptiles evolved from amphibians over 340 million years 
ago. .... As in other fossil groups, major phyla appear abruptly and fully... [DOC] [TLE] Free Flashcards about NATURAL HISTORY - StudyStack [PAR] THE LARGEST SINGLE LIVING ANIMAL CELL ON EARTH IS THE YOLK OF 
THIS CREATURE'S EGG ... 500-MILLION-YEAR-OLD FISH ARE THE FIRST 
KNOWN FOSSILS OF THIS BACKBONED GROUP OF ANIMALS, 
VERTEBRATES. [DOC] [TLE] Hall of Vertebrate Origins - American Museum of Natural History [PAR] Explored here are groups within the vertebrate family that exhibit crucial ... of the 
earliest vertebrates, animals that lacked a fully developed backbone but had a ... 
These touch fossils include a 100-million-year-old fish; the tooth of one of the ... 
ever to have lived; and a vertebra from a marine animal known as a plesiosaur. [DOC] [TLE] Shark Evolution (Palaeontology & Biology) - Anaspides.net [PAR] There were sharks in the oceans of earth long before the first animals had begun 
to ... In the next 100 million years all the major fish groups that are found on earth 
today ... Until recently scientists thought that there were no shark fossils older 
than ... All that is known about ancient sharks and their evolution has been 
gleaned... [DOC] [TLE] The fossil record - World Book Student [PAR] The oldest fossils of vertebrates (animals with a backbone) are fossil fish about 
500 million years old. Fossil ... many important groups of animals and plants have 
left fossil remains. ... Strata dating from 600 million to 500 million years ago 
contain fossils of ... Remains of fish first appear in strata about 400 million years 
old. [DOC] [TLE] Fossilised creatures known as vetulicolians are distant relatives of ... [PAR] Oct 16, 2014 ... This 500-million-year-old fossil has been used by Australian ... creatures had a 
rod through their tail similar to a backbone, which places them as distant ... 
believed to be distant cousins of vertebrate animals such as humans and fish. ... 
for the fossils to be described as a group on their own: the vetulicolians. [DOC] [TLE] Rise of Animals: David Attenborough explores evolution of ... [PAR] Sep 20, 2013 ... Every single animal with a backbone descends from a tiny fish of the ancient 
Cambrian Ocean. ... For the first 150 million years or

Question: 500-million-year-old fish are the first known fossils of this backboned group of animals
Answer: vertebrates