Patty designs an experiment to find out how much water is in an orange. She slices ten oranges, weighs each orange, then dehydrates the slices. When the slices are dry, she again weighs the slices that make up each orange. She puts her data in a table like the following: What data should go in the last column?
A. the difference in weight
B. the size of each orange
C. the number of slices
D. the total weight

I would say A

Explanation:

The reason I would say A is because you don't need to know the total weight of the oragne. You don't need to know the number of slices because that already in the qustion. I would say a  

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs

the three components of a nucleotide are the nitrogenous base, the phosphate group and the five-carbon sugar.