Plasmids have a high probability of being present in the new generation of cells by all of the following EXCEPT: A. being present at a high number so that some copies will end up in each new cell after cell division B. by having a mechanism to allow for segregation of plasmids into daughter cells C. carrying a gene or genes essential for survival D. all are plausible mechanisms that could ensure maintenance of a plasmid in the population

C. carrying a gene or genes essential for survival

Explanation:

A plasmid can be defined as the small, extrachromosomal, double stranded DNA that can be found in the bacterial cell and in other prokaryotes. The plasmid DNA remain physically separated from the chromosomal DNA. The plasmid DNA can replicate independently.

The plasmid DNA carries genes which can facilitate the survival of the organism. This gene may provide the selective advantage like antibiotic resistance to the bacteria or any other organism. But the gene may not be essential for the survival of the organism.

The most likely answer here would be that all of these processes are involved in the transmission of a nerve message. 

The reason for this is because - the sodium-potassium pump and exocytosis are two essential processes that happen during every action potential, they are actually what makes the action potential be what it is. At the same time it's true that diffusion happens because it has to be present to a certain degree in order for the nerve message to be pased all the way from a fingertip to the brain.