Why are pores necessary in the nuclear envelope?

Read the statements below regarding the nucleus of a cell. Identify them as true or false and select the correct combination option. I. The nucleus displays an elaborate nucleoprotein fiber called chromatin during the interphase of the cell cycle. II. The space between the parallel membranes of the nuclear envelope is called the nucleoplasm. III. Nucleus was discovered first by Flemming. IV. The nuclear pores within the nuclear envelope are formed by the fusion of both membranes. {:("No.",I,II,III,IV),(1,"True","True","False","False"),(2,"True","False","False","False"),(3,"True","True","False","False"),(4,"True","False","False","True"):}

Why is ecdysis necessary in the insects ?

Assertion : Nucleus is the controlling centre of a cell. Reason : Pores in the nuclear envelop regulate the flow of materials in and out of the nucleus.

What precedes reformation of nuclear envelope in M-phase

Which one of the following precedes re-formation of the nuclear envelope during M phase of the cell cycle.