This is a big hint about one of the differences between these two cell types. Prokaryotic cells have no nuclei, while eukaryotic cells do have true nuclei. This is far from the only difference between these two cell types, however. A eukaryotic cell contains a number of chromosomes; a prokaryotic cell contains only one circular DNA molecule and a varied assortment of much smaller circlets of DNA called plasmids.. 2  The smaller, simpler prokaryotic cell requires far fewer genes to operate than the eukaryotic cell.
Most women and men with chlamydia do not have symptoms. The time between exposure to chlamydia and the start of symptoms-the incubation period-may range from days to months. If symptoms appear, it is usually 1 to 3 weeks after sexual contact with an infected person.
An incubation period refers to the amount of time between the moment a person or animal is exposed to a bacteria or virus and the appearance of the first symptoms.However, an incubation period can also refer to the length of time necessary for oviparous animals to develop while inside the egg.epatitis A can have an incubation period of up to 50 days, while for rabies, the incubation period can be as long as one year. Diseases with shorter incubation periods include the common cold, dengue hemorrhagic fever and cold sores or herpes, with an average of 10 hours.