In ncert (class 11 bio pg 165) it is written that cells under microscope do not show nuclear envelope ...but the first line of metaphase states that it starts with the disintegration of nuclear envelope.. then my question is how did the disintegration occur if there wasn't any n envelop at the first place???
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Prokaryotes are organisms whose cells lack a nucleus and other organelles. Prokaryotes are divided into two distinct groups: the bacteria and the archaea, which scientists believe have unique evolutionary lineages.
The nuclear membrane is thus absent during prophase, metaphase, and telophase. The nuclear membrane is present (and essential) during all periods of interphase. The main functions of interphase are the synthesis of cellular proteins, DNA replication, and cellular growth.
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