Younger Fossils Are Often Morphologically Different from Older Fossils in a Lineage

question 52

Multiple Choice

Younger fossils are often morphologically different from older fossils in a lineage. How do paleontologists think the morphological transition happened?

• A) The younger fossils are a species that underwent anagenesis, gradually evolving a new morphology.
• B) The younger fossils are a new species that branched off the older one, rapidly evolving a new morphology.
• C) The younger fossils are likely a new species from a different lineage that migrated to the area.
• D) a and b
• E) none of the above

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