Question

I will medal Which happened during the Paleozoic era?


A.
Sponges and invertebrates dominated the seas.


B.


No life was present yet on earth.


C.


Bacteria were the dominant life-forms.


D.
Bony fish evolved.

Answer 1

Which is a correct order from older to younger for layering of rocks shown in the figure?




A.


B, C, D, E, F


B.


H, B, C, G, I


C.


B, I, D, H, C


D.


F, E, D, C, B