Signals can travel in either direction in both axons and dendrites A) pumping three positively-charged sodium ions out of the cell for every two positively-charged potassium ions they pump into the cell B) pumping both positivelycharged sodium ions and positively-charged potassium ions out of the cell C)pumping positively-charged sodium ions out of the cell and negatively charged chloride ions into the cell D)pumping positively-charged sodium ions out of the cell and negativelycharged potassium ions into the cell

If you are talking about typical sand you would find at the beach or in a river bed here on earth, there are some differences. i would say the first biggest difference is in composition and mineral make up. although the moon is largely made of the same materials as earth’s mantle and surface, the moon experiences very little weathering (no liquid water and virtually no atmosphere). “earth” sand is typically composed mostly of quartz grains. this is because quartz is highly resistant to both physical and chemical weathering. most of the other minerals originally with the quartz are broken down into fine clay and carried away, chemically eroded/ dissolved, or some combination of the two. this usually leaves only the quartz behind, and so most of the time when you see/think of sand, you are talking about quartz. without these weathering mechanisms on the moon, the “sand” (which is likely more silt or clay sized grains anyways) would consist of mostly other minerals like anorthosite, olivine, and proxene.

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True because work is more professional and you need specific skills. in your personal life you need different skills such as maintaining relationships.

Ithink the answer is d