A scientist places four identical cells into four different liquids, each with different concentrations of magnesium. Cell Description of Liquid Result
W Slightly more magnesium than the cell Took in magnesium
X The least amount of magnesium Took in magnesium
Y Slightly less magnesium than the cell Took in magnesium
Z The most amount of magnesium Took in magnesium
Which shows evidence of active transport?

cells W and Z
cell W only
cell Y only
cells X and Y

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.

One splits the atoms and molecules  the other combines them