test8/12/2024

Question 1

The early history of
Earth is measured in

Answer 1

geologic time.

Question 2

• major division
  of Geologic time
  encompasses several
  million years

Answer 2

“EON”

Question 3

PALEOZOIC
● Incredible diversity of
marine animals

● Emergence of
chordates - animals
with simple spinal
cord

● Arthropods - creatures
with joined
exoskeleton

Answer 3

CAMBRIAN (541 TO 485 mya)

Question 4

• creatures
  with joined
  exoskeleton

Answer 4

● Arthropods

Question 5

PALEOZOIC

● Life largely
remain confined
on the seas

● Organisms began
their ways on the
shore

Answer 5

CAMBRIAN ORDOVICIAN (541 TO 485 mya) (485 TO 443

mya)

Question 6

PALEOZOIC

● Large reef system
flourished

● Emergence of insects
and plants (moss)

● Primitive insects:
centipedes and
arachnids

Answer 6

SILURIAN (443 TO 419 mya)

Question 7

PALEOZOIC

● Greatest diversity of fish
life: Placoderm and
prehistoric sharks

● Emergence of first
amphibians: LOBEFINS

● Forest began to appear
(plants developed woody
stem and leaves)

Answer 7

DEVONIAN(419 TO 358 mya)

Question 8

d swamps
● Amphibians become
highly evolved
● Emergence of
Pangaea

Answer 8

CARBONIFEROUS (358 TO 299

mya)