Author Question: Earth's early life forms were marine organisms. Life moved to the land during the A) Cambrian ... (Read 148 times)

aabwk4 · **on:** Jul 29, 2018

Earth's early life forms were marine organisms. Life moved to the land during the

A) Cambrian period.
B) Ordovician period.
C) Silurian period.
D) Triassic period.

Question 2

At the end of the Ordovician, many shallow-marine organisms went extinct due to

A) deep water predators.
B) a long duration of high sea level.
C) cooling temperatures, increased glaciation, and decreased sea level.
D) cooling temperatures, increased glaciation, and a rise in sea level.