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Photosynthesis arose in a group of bacteria known as
Electrodes
Conductive mediums that transfer electrical charge to another medium.
Meninges
The three layers of protective tissue that cover the brain and spinal cord, comprising the dura mater, arachnoid mater, and pia mater.
Dura Mater
The tough outermost membrane enveloping the brain and spinal cord.
Pia Mater
The delicate innermost layer of the meninges, the membranes surrounding the brain and spinal cord.
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