Question

Which happened during the Paleozoic era?








A.

Bacteria were the dominant life-forms.








B.
Bony fish evolved.







C.

No life was present yet on earth.








D.
Sponges and invertebrates dominated the seas.

Answer 1

@sammixboo

Answer 2

i think it is a or c

Answer 3

Take a look here -> http://www.infoplease.com/ipa/A0001822.html It shows the different time period and what happened. Take a look at the second section labeled 'Paleozoic Era' and the lok at the Chart underneath it (the chart is also the second chart on the page) and look in the column labeled 'events'. It tells you what happened during that era :P

Answer 4

@sammixboo so d?

Answer 5

It isn't A, because bacteria was the dominant in the Precambrian Time

It isn't C, because no life wasn't present in the Precambrian Time, but Sea Life was there in the Paleozoic Era

I think it is B or D, but I am going more for B, because it says the first jawed fish was forms in that era

Answer 6

Aka bony fish