Which of the following observations best indicates that living things evolved in different time periods?
a. Extinct organisms found only as fossils were destroyed in global catastrophes.
b. Layers of rock are deposited in a slow, gradual process.
c. Species in a location resemble one another more than species in another location.
d. Fossil A always appears in a layer below fossil B.
e. In many parts of the world, a rock layer of type A always appears below a rock layer of type B.
Ans: d. Fossil A always appears in a layer below fossil B.
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Answer the following statement true (T) or false (F)
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