What happened to all the continents by the close of the paleozoic era

Answer;

They fused into Pangaea

By the close of the paleozoic era all the continents fused into Pangaea.

Explanation;

Paleozoic era is the era of "ancient life".

During the early Paleozoic era, South America, Africa, Australia, Antarctica, India, and perhaps China comprised the vast southern continent of Gondwana.

At the beginning of this period, all continents joined together to form the supercontinent Pangaea, which was encircled by one ocean called Panthalassa.

answer; both surfaces of the membrane are nonpermeable