Please write out the problem you are specifying <span />
Answer:
We only know it's there because we can see the effect of its gravity. Scientists study dark matter by looking at the effects it has on visible objects. Scientists believe that dark matter may account for the unexplained motions of stars within galaxies. Computers play an important role in the search for dark matter information.
Explanation:
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Plant cells have a rectangular shape and a cell wall, while animal cells have a circular shape and no cell wall
