The DNA is tightly wrapped around histone proteins in a chromosome why is this packaging necessary? 1. Because the dna molecules will down without it .
2. Because the dna molecules will dissolve in cell water .
3.) because the long dna will fit inside the cell.
4.) because the dna needs to attach itself to support .

3.) because the long dna will not fit inside the cell.

Explanation:

This question is oddly written. At first glance, I can tell it's not 1 or 2 because DNA doesn't "dissolve" in cell "water", nor will it "down" (I'm assuming this means "drown"?).

The main reasons for DNA packaging are so that the DNA can fit into the cell, and so it's protected from damage. The DNA is vital to the cell, so it protects it by coiling it up. Coiling and packaging are also important when it comes to gene expression.

water

Explanation:

The cattle are herbivorous animals which feed upon plants and their products. According to the given situation, as the streams are dry. The area may be devoid of water. The cattle population will compete for the available water source in the scarcity of water. This may lead to decline in the population of cattle as water is the basic need for the survival of the living organisms on earth specifically for the drinking purpose.