Mammals made their first appearance during the Mesozoic era in the Triassic period. This period lasted from about 252 million years ago to 201 million years ago. Mammals evolved from their synapsid reptile ancestors during this time.
The Silurian period followed the Ordovician period.
I am a computer program and do not experience physiological processes like menstruation.
No, you cannot have a period if you do not ovulate.
The relative refractory period is the time when a neuron can respond to a stronger stimulus, while the absolute refractory period is when a neuron cannot respond at all. The relative refractory period follows the absolute refractory period and allows for increased neuronal excitability.
It is in the Trassic Period.
Mammals made their first appearance during the Mesozoic era in the Triassic period. This period lasted from about 252 million years ago to 201 million years ago. Mammals evolved from their synapsid reptile ancestors during this time.
Yes they did. We have proof that they did by finding the bones of many that existed thousands of years in the past. Yes,dinosaurs did exist 65 million years ago. They also became extinct 65million years ago. Whats left of them now is fossils hidden inside layers of rock. The dinosaurs lived in three different Mesozoic time periods. The Trassic, Jurassic, and Cretaceos. In the Early Trassic the first dinosaur walked the Earth. In the Late Trassic more dinosaurs evolved. The Jurassic was the first time period to have dinosaurs flourishing. Mostly were giants like Apatosaur. Then the last time period, Cretaceos. The Cretaceos held some of the most famous dinosaurs, like Tyrannosaurus Rex and Tricerotops. Then they all became extinct at the end of the Cretaceos. So dinosaurs did exist at one period of time.
They evolved in the Triassic and mainly spreadout to dominate the Erath in the Jurassic most people will say this is the golden age of the dinosaurs, however I'd say the early-mid creataceous is, it's when all the weird species came
Mammals first appear in the fossil record of the Mesozoic Era.
The Jurassic period was followed by the Cretaceous period.
1st period -Formative Period 2nd period-International Period 3rd period -National Period 4th period -World Music Period
The period after the Devonian Period (416 to 359.2Ma) is the Carboniferous Period (359.2 to 299Ma).
There are many famous periods in Japanese History. * Edo Period * Meiji Period * Jomon Period * Yayoi Period * Kofun Period * Nara Period
The Silurian period followed the Ordovician period.
early period
The Ordovician period came after the Cambrian period.