The reason why plants go limp when they don't have water for a while A. There is no actual physical change when plants don't have water.
B. Cells sink in because the salt becomes too concentrated and it draws in the cell walls.
C. The cells sink in a little because the central vacuole has very little water in it and becomes concave.
D. None of these were the correct explanation.

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.

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