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What else can I help you with?
Do All living things are unified in having cells?
The vast majority of living things have a cell structure even if they are single celled. There are however a few exceptions. Viruses do not. Instead of a cell membrane they have a protein jacket. Pirons (responsible for mad cow disease and scarpies) are just exotic enzymes capable of reproducing themselves. It is debatable whether virus and Pirons are actually living things.
Which group contains the small organisms?
viruses and pirons -- it should be noted that these 'organisms' are in the grey area between living and non-living things.
What is the last a living thing characteristic must maintain before we move from theliving to the non living?
This is a difficult question as the distinction between living and non-living becomes very blurred when we get down to viruses, Pirons and crystals. For me, the single most important defining trait would be the utilization of enzymes to manufacture body components. This isn't a hard and fast rule however, the controversy remains for debate.
What is the result when errors occur in chromosomes?
Small errors or errors in insignificant parts of the chromosome may lead to no problems, but as the errors increase in size/scope you start having problems. Errors may cause proteins to have problems, causing property changes (shape, charge areas), functional changes (no longer able to catylize reactions), or even become problematic for the cell (buildup of junk, pirons). That, as well as other changes to the chromosome, may trigger apoptosis (cell death), mark for destruction by white blood cell, proliferation (cancer), and other transformations.
