Answer:
D) found in a limited time span
Explanation:
Index fossils are the remains of living organisms for which we have already established relative age. These are fossils that only existed during a limited period of geologic time and are easily identified, found in large volumes, and found in many different locations around Earth. Due to these factors, index fossils may be used as a guide for comparison in determining the relative age of an unknown object.
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When organisms produce more offspring than survive, the area can become overcrowded, and they will compete for nutrients and other resources and necessities.
I took the test that featured this question the answer is A
A tide just after the first or third quarters of the moon when there is least difference between high and low water
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