More dense means something has more molecules per volume. Less dense means that something has less molecules per volume.
Think of cheesecake vs. a regular cake. In a regular cake, there are often holes within the cake, making it light and fluffy. In a cheesecake, the cake is packed and there is not very much room in between the molecules. This is why some people refer to cheesecake as a "dense" cake.
Answer:
They are typically larger than prokaryotic cells
The DNA of a eukaryotic cell is contained in the cell nucleus.
That would be the R-value
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