Crinoids and ammonites were the dominant marine life forms during the Mississippian stage of the Carboniferous period.
Dinosaurs
Dinosaurs.
My cousin lenny
Adam And Eve
a shark and a snail
The dominant organisms during the carboniferous time period were plants. They were large, vascular, land plants that sometimes grew to be one hundred feet or more.
Monotheism
Baroque
dimetrodon and edaphosaurus
Metazoans were abundant during the Vendian Period.
Congress was the dominant political institution in the US during most of the 19th century. The presidency became more powerful during the 20th century.
narwhals