Deep-diving submarines have helped scientists learn that photosynthesis does not take place in the deeper parts of the ocean. Which of the following explains why photosynthesis does not occur very deep in the ocean? a. There is no oxygen.
b. There is no glucose.
There is no sunlight.
c. There is no sunlight.
d. There is no nitrogen.

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.