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Gwar [14]
3 years ago
9

The fossil record shows that some animals, such as the horseshoe crab, have existed unchanged for millions of years. Other organ

isms, such as pigs, have undergone a well-documented sequences of changes. Which type of organism would be most useful as an index fossil? Explain your answer.
Biology
2 answers:
Leno4ka [110]3 years ago
6 0

The horsehoe crab because it was one of the first animals to ever live on earth

True [87]3 years ago
3 0
<h3><u>Answer;</u></h3>

Pigs would be more useful as an index fossil.

<h3><u>Explanation; </u></h3>
  • An index fossil is an animal or plant that is preserved in rock record of the earth and has a characteristic of a certain period of geologic time or environment. A useful index fossil must be abundant, easily recognizable, and have a geographic distribution.
  • <em><u>Pigs would be a useful index fossil because the well-documented changes that occurred in the fossil record would help geologists determine the ages of rocks much more than the unchanging horseshoe crabs.</u></em>
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