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Question
Which characteristic defines the Paleozoic era?(1 point)
Responses
Reptiles became dominant after a mass extinction.
Reptiles became dominant after a mass extinction.
Simple, one-celled life forms were dominant.
Simple, one-celled life forms were dominant.
Mammals and other warm-blooded animals became dominant.
Mammals and other warm-blooded animals became dominant.
Animals with shells and hard parts were dominant for the first time.
1 answer
The characteristic that defines the Paleozoic era is:
Animals with shells and hard parts were dominant for the first time.
This era is known for the emergence of many diverse forms of life, particularly during the Cambrian Explosion, which saw the development of hard-shelled organisms.
