The concentration of ions in the chemical environment surrounding the neurons must be tightly regulated for neurons to function properly. Which cell is most responsible for this?

the "power" of a lens is its resolution power, or its ability to distinguish between to closely located points. with the low power lens, it is likely you will see the rough form of the hay and maybe some movement of dots around the hay. however, when observed with the high power lens, the detailed features of the hay become visible and the microbes being grown are more clearly visible.

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it should be d) transitional fossils.

they show the gradualism of evolution throughout a period of time