How Species changed through Geological Time
When did birds first appear?
In the Jurassic Period (195 million years-136 million years)
What Era did the first organism show up?
The Pre-Cambrian Era
What was unable to adapt to the cold or heat changes in the Pleistocene Epoch?
All species
What was the last thing to evolve?
Earliest humans
When did the multi celled and single-celled organisms go extinct?
The End of the Era.
When did Fish start getting dominant?
In the Devonian Period (355 million years-345 million years)
When did Dinosaurs first appear?
Mesozoic Era (230 million years ago to 65 million years ago)
What is the dominant organism by the end of the Era?
Trilobites
How have several Species survived?
Species evolved to obtain new variations.