Multiple Choice
The fossil record indicates that the immediate ancestors of modern marine animals diversified in the ____ period, right after the ____ extinction.
A) Ordovician; Cambrian
B) Jurassic; Triassic
C) Carboniferous; Devonian
D) Paleogene; Cretaceous
E) Triassic; Permian
Correct Answer:

Verified
Correct Answer:
Verified
Q28: Which group of animals are living representatives
Q29: What is the general trend in diversity
Q30: The movement of organisms away from their
Q31: Although ferns and conifers maintained their diversity
Q32: Fossil evidence from five continents exists for
Q34: At times when Earth's climate was cooler
Q35: Today we are living in one of
Q36: The most severe mass extinction on Earth
Q37: Changes in the timing of developmental events
Q38: As environments change, poorly adapted organisms will