<span>The purpose of a neuron is to receive information, and then determine where to send the message of that information (e.g. to a muscle). The shape of a neuron is suited for this because it has a shape that looks like tree branches which allow it to receive and send messages at a very fast rate in order to achieve its purpose.</span>
<h3><u>Answer;</u></h3>
d. before the Neogene era.
<h3><u>Explanation;</u></h3>
- <em><u>The Silurian Period was a third period of the Paleozoic Era that occurred from 443 million to 416 million years ago. This period occurred after the Ordovician Period and was then followed by the Devonian Period.</u></em>
- Silurian period is the period that many biologically significant events took place. There was a widespread radiations of crinoids, continued priliferation and expansion of the brachiopods and also the oldest known fossils of coral reefs.
I believe that the answer to the question provided above is that the <span> time frame is considered rapid environmental change is the modernization period.</span>
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