| 1 | Each species has a different number of chromosomes in their nuclei. | |
| 2 | So how do you store all that DNA in a tiny nucleus? | |
| 3 | If there wereepithelial cells on the root, we could use their nuclei for DNA analysis. | |
| 4 | For 70 years scientists have reasoned that evolution of nucleus was the key to complex life. | |
| 5 | HISTONE: Histones are crucial in the process of condensing and packing DNA within a cell' s nucleus. |