What was life after the ordovician-silurian period

answer: all of the major animal groups of the ordovician oceans survived, including trilobites, brachiopods, corals, crinoids and graptolites, but each lost important members.

explanation:

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint

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what do the different brain waves do?

explanation:

brainwaves are produced by synchronised electrical pulses from masses of neurons communicating with each other. brainwaves are detected using sensors placed on the scalp. brainwave speed is measured in hertz (cycles per second) and they are divided into bands delineating slow, moderate, and fast waves.