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NISA [10]
3 years ago
9

Witch of these is a characteristic of index fossils

Biology
1 answer:
faltersainse [42]3 years ago
8 0

Explanation:

Index fossils are fossils type fossils that are used to identify stratigraphic records and their positions. They are vey key in determining relative ages of rock sequences.

  • These fossils have a short vertical stratigraphic range.
  • Index fossils have short evolutionary history.
  • They are widely distributed in nature.
  • Examples of index fossils are trilobites and ammonites.
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1. C

2. C

3. D

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Density-dependent factors mean that these factors are influenced by the density of the population. In this case rate of infection of the disease is dependent on the density of the population The higher the density the higher the infectivity and vice versa.

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