I've answered this question in the past and if it is multiple choice like the last one then it would be A.
Answer:
population
Explanation:
Paleozoic.
Era immediately follows Precambrian It lasted about 4.5 billion years.
When did abundant fossil evidence first appear in the geologic record.
540 million years ago.
It is C
I had this on my test last week
smaller and less smooth i think
