Question

Which characteristic defines the Paleozoic Era?

A) Mammals and other warm-blooded animals became dominant
B) Reptiles became dominant after a mass extinction
C) Animals with shells and hard parts were dominant for the first time
D) Simple, one-called life forms were dominant

My answer is C, is that correct?

Answer 1

[AI-generated answer — Bot GPT 3.5]

Yes, your answer is correct. The characteristic that defines the Paleozoic Era is that animals with shells and hard parts were dominant for the first time. This era, which lasted from around 541 million to 252 million years ago, witnessed the emergence and diversification of various animal groups with hard external coverings such as shells, exoskeletons, and other hard structures. This includes trilobites, brachiopods, mollusks, corals, and early vertebrates.