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Nematodes, or roundworms, are believed to have first appeared on Earth over 500 million years ago, during the Cambrian period. Fossil evidence suggests they have existed since then, adapting to a wide range of environments. Their evolutionary history indicates they are one of the most ancient and diverse groups of multicellular organisms.
What else can I help you with?
What does sub-phylum mean?
First something has been divided into phylums - one group. But that wasn't enough, There were still things in that group which needed to be further sorted, so a sub-phylum was created. Let's say you have one group - cars. That's your phylum. Then you have sports cars, that's a sub-phylum.
When did modern humans appear on earth according to fossil records?
According to the fossil records, the modern humans did appear on earth more than 130,000 years ago.
Is phylum a name of the first level in the classification system.?
No, the highest level is kingdom.
What era did the first Cats appear on the Earth?
Not sure what era but fossils of cats were found that dated back to the Eocene period. Cats came around in the 19th century.
When did transformational grammars first appear?
1957
When did Phylum Chordata first appear?
Phylum Chordata first appeared over 500 million years ago during the Cambrian period in the early Paleozoic era. It includes vertebrates such as fish, amphibians, reptiles, birds, and mammals, making it one of the most diverse and successful groups of animals on Earth.
Where did Arthropods first appear on earth?
yes
When did the first ladybug appear on earth?
Chick or the egg!
What were the first orgisms to appear on earth?
In someones pants??
What were the first creatures to appear on earth?
well the first thing was algae...and formed from there on
What organisms are thought to have been the first to appear on earth?
bacteria
Is a horse a phylum or class?
First things first: there is no such thing as an "ecological phylum". A phylum is a taxonomic term. Horses are in the Phylum Chordata, and the Subphylum Vertebrata. They are in the Class Mammalia.
When did first organism appear on earth?
Read your science book chapter . It is on the first page.
When did the first creatures with bones appear on earth?
the animals come on earth because god put them there
What ecological phylum or class is a horse?
First things first: there is no such thing as an "ecological phylum". A phylum is a taxonomic term. Horses are in the Phylum Chordata, and the Subphylum Vertebrata. They are in the Class Mammalia.
When did fish first appear on earth?
About 475 million years ago
When did woolly mammoth first appear on earth?
about 236,00 years ago.
