Which of the following correctly characterizes the arachnoid mater? 1. middle layer of the meninges that contains cerebrospinal fluid2. attached to the surface of the brain and spinal cord3. outermost layer of the meninges that contains cerebral fluid4. attached to the inner surface of the cranium and vertebrae

1. middle layer of the meninges that contains cerebrospinal fluid

Explanation:

Arachnoid is the middle layer of the meninges that contains cerebrospinal fluid. Arachnoid is the membrane responsible for separating the dura and pia mater, which are the membranss responsible for covering the organs of the central nervous system. Already cerebrospinal fluid is a lubricating fluid that fills the space between aduramater, arachnoid and pia mater

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protist eukaryotes that are not plants, animals, or fungi ("misfits")