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Sharks were first found to have existed in the Ordovician Period which was 450-420 million years ago. Sand sharks are also known as nurse sharks.
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When did abundant fossil evidence first appear in the geologic record?
The first abundant fossil evidence first appeared during the Paleozoic Era. It was the first era of the Phanerozoic Eon, which occurred 540 million years ago.
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.
The most important animal to appear during the Cenozoic era was the?
Mammals is the answer
Is paleozoic the second era?
No Paleozoic is not the second era it is the first era
What era are fish in?
Paleozoic Era
In what Era did the first land dwelling organisms appear?
the paleozoic era
What era did the first forests appear?
Mesozoic
In what era did the first forest appear?
Mesozoic
In what era did vertabrates appear?
Vertebrates first appeared during the Paleozoic era.
What era did saber-toothed cat first appear?
probably mesozoic era
When did flying insects first appear?
the cenozoic era
What are examples of living fossils?
crocodiles, cockroaches, centipides (they were from the pre-dinosaur era and grew up to 6ft), sand sharks havent changed, and some birds
What era did first life appear?
Pre-Cambrian. It's when bacteria first came about.
In what era did life first appear?
Pre-Cambrian. It's when bacteria first came about.
What era did the first animals with both teeth and fins appear?
Silurian
When did cockroaches first appear?
Actually they were from the Pennsylvanian Period and the Paleozoic Era...
What era did large mammals first appear?
The Cenozoic era at about 65 million years ago. The Paleogene period.
