What did Darwin and Marx, who lived in the nineteenth century, share with intellectuals of the eighteenth-century Enlightenment

the answer is 250 percent.

radioactive dating, also known as  radioisotope dating  is a process that in  estimating the approximate  age  of  rocks. these data can be analyzed from  the studies dealing with the  decay of the radioactive elements that are present in these rocks. in nature, there are a few types of materials or atoms which are quite unstable and they spontaneously decay or breakdown to form other kinds of atoms.

travels along an axon. this triggers a wave of electrical activity that passes from the cell body along the length of the axon to the synapse

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