The cerebrospinal fluid is OA) secreted by the hypothalamus
B) a filtrate of the blood
C) cytosol secreted from ependymal cells
OD) a secretion of glial cells
a

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Mars and earth have quite a few things in common. both are  terrestrial planets, both are located within the sun’s  habitable zone, both have  polar ice caps, similarly  tilted axes, and similar  variations in temperature. and according to some of the latest scientific data obtained by rovers and atmospheric probes, it is now known that mars once had a  dense atmosphere  and was covered with  warm, flowing water.