Living organisms are commonly divided into six kingdoms: archaea, bacteria, fungi, protists, plants, and animals. What’s the biggest problem with classifying organisms in this way?

they may be in the same category but they don't have the same biological makeup

humans, along with other animals and plants, have linear chromosomes that are arranged in pairs within the nucleus of the cell. the only human cells that do not contain pairs of chromosomes are reproductive cells, or gametes, which carry just one copy of each chromosome.