44 autosomes and 2 sex chromosomes.
This would be an example of a physical change. The salt is still salt, it just dissolved.
The answer is Denitrification.
Denitrification is the reduction of nitrates back into the largely inert nitrogen gas (N2), completing the nitrogen cycle. This process is performed by bacterial species such as Pseudomonas and Clostridium in anaerobic conditions.
The DNA replication is a biological process where two DNA strands where each of the strands is used a template to form a new strand. The question answered in discovering DNA replication is on how DN evolved. I hope it helps.
I believe the answer is frequency