In which group of eukaryotic organisms does the nuclear envelope remain intact during mitosis? Naim 23:21 The Cell Cycle In which group of eukaryotic organisms does the nuclear envelope remain intact during mitosis? A) seedless plants B) dinoflagellates C) diatoms D) dinoflagellates and diatoms only E) seedless plants, dinoflagellates, and diatoms Answer: D Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+