Which animal dominated in paleozoic era

Which of the following was dominated in paleozoic era?

The plants that first became dominant in the Mesozoic era after the mass extinctions of the Palaeozoic era were the :

Which periods of paleozoic era are referred as (a) Age of fishes (b) Invertebrates

Which marine group was predominant during the Paleozoic period?

List periods of Paleozoic era.

In which period of paleozoic era first vertebrate appeared.

In which period of paleozoic era first vertebrate appeared.

Name the periods in the paleozoic era (starting from recent) ?