The carbon lives in the plant or animal and when it dies, nitrogen sinks into the soil which is used as nutrients for plants.
The replication of chromosomes by eukaryotes occurs in a relatively short period of time because each chromosome contains multiple replicons. Prokaryotic such as bacteria often contain only one chromosome with one origin at which two replication forks assemble and move in opposite directions.
It’s
Primarily trouble is the answer I read it
It is system because bone nucleus and all the rest you put down are all a system structure in the body