17 million years ago
Fish, amphibians,
nd insects appear;
first seed plants
appear
354 million years ago
Winged insects appear
323 million years ago
First mayflies,
cockroaches, and
reptiles appear;
First evergreen trees
appear
290
Reptiles and
mammal
-like
forms
abound
If scientists were comparing developments in Earth's history during these
periods, why would the Carboniferous
Period not be considered more or
less the same as the others?
F.
It is the oldest period.
G.
It is far shorter than the other periods.
It is divided into two different periods.
It is far longer than the other periods.
ch of these types of animals has been on Earth the longest?
mammal-like forms