The role of mass extinction in evolution. At the most basic level, mass extinctions reduce diversity by killing off specific lineages, and with them, any descendant species they might have given rise to. ... But mass extinction can also play a creative role in evolution, stimulating the growth of other branches.
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The chemical and electrical signals are used by brain for communication,sensation and thought. Brain uses electrical signals from communication.
It can cause bacteria in bacteria can cause diseases
The time when you can't see any of the moon at all is called "New Moon".
14.77 days later, the phase is "Full Moon".
