The food chains make up the food webs
Certain fossils, called index fossils, help geologists match rock layers. To be useful as an index fossil, a fossil must be widely distributed and represent a type of organism that existed for a brief time period. Index fossils are useful because they tell the relative ages of the rock layers in which they occur.
Mangroves<span> provide a number valuable </span>ecosystem services<span> that contribute to human well being including provisioning, regulating ,and habitat.
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converting food into smaller molecules
