in which group of eukaryotic organisms does the nuclear envelope remain intact during mitosis
dinoflagellates and diatoms
The group of eukaryotic organisms in which the nuclear envelope remains intact during mitosis is called the "Closed Mitosis" or "Closed Nuclear Envelope" group. Closed mitosis is characterized by the nuclear envelope remaining intact throughout the entire process of mitosis.
To determine this answer, you can refer to biological textbooks or research articles that discuss different types of mitosis. By understanding the characteristics of mitosis in various eukaryotic organisms, you can identify the group in which the nuclear envelope remains intact during the process.