They are joined together by a common centromere.
The answer is b. because you wouldn't want a daughter cell that didn't have <em>all </em>necessary to be a complete cell, and this could be messed up if the DNA didn't replicate prior to cell division
C. They all contain a transparent part with at least one curved surface that refracts light.
Hope this helps!!
They lose aater when it evropares but at the same time they gain water when it rains
