The first option. Phragmoplast is the structure which gives rise to cell plate. Both phragmoplast and contractile ring are elements that aid in cytokinesis (cell division). These events occur after karyokinesis ( Nuclear division), while chromosomal recondensation and reassembly...lamina are a part of nuclear division. So is reformation of nuclear envelope. Hope this helps :)

Preceding reformation of the nuclear envelope during M phase of the cell cycle

The cell cycle is a highly regulated process that consists of several distinct phases, including interphase and mitosis. During mitosis, the nuclear envelope breaks down, allowing the genetic material to be properly segregated into daughter cells. The reformation of the nuclear envelope is a crucial step in completing mitosis and ensuring the proper distribution of genetic material.

Recondensation of chromosomes and reassembly of the nuclear lamina

The first step that precedes the reformation of the nuclear envelope during M phase is the recondensation of chromosomes and reassembly of the nuclear lamina.

1. Recondensation of chromosomes: During the earlier stages of mitosis, the chromosomes become highly condensed and visible under a microscope. This condensation is important for the proper segregation of genetic material. As the cell progresses through M phase, the condensed chromosomes begin to decondense, allowing for the reformation of the nuclear envelope.

2. Reassembly of the nuclear lamina: The nuclear lamina is a network of intermediate filaments that provides structural support to the nuclear envelope. During prophase, the nuclear lamina is disassembled, contributing to the breakdown of the nuclear envelope. However, as the cell progresses into telophase, the nuclear lamina begins to reassemble. This reassembly is essential for the reformation of the nuclear envelope and the restoration of nuclear compartmentalization.

Formation of the contractile ring and phragmoplast

The formation of the contractile ring and phragmoplast are processes that occur during cytokinesis, which is the final stage of cell division. These processes are not directly involved in the reformation of the nuclear envelope during M phase.

1. Contractile ring formation: In animal cells, the contractile ring is a structure composed of actin filaments and myosin motor proteins. It forms at the equatorial region of the cell during anaphase and is responsible for the division of the cytoplasm into two daughter cells. The contractile ring contracts, causing the plasma membrane to invaginate and eventually pinch off, resulting in the formation of two separate cells.

2. Phragmoplast formation: In plant cells, cytokinesis is more complex due to the presence of a cell wall. During telophase, microtubules form a structure known as the phragmoplast. The phragmoplast guides the deposition of cell wall material between the two daughter nuclei, eventually leading to the formation of a new cell wall that separates the two daughter cells.

In conclusion, the reformation of the nuclear envelope during M phase of the cell cycle is preceded by the recondensation of chromosomes and reassembly of the nuclear lamina. The formation of the contractile ring and phragmoplast, on the other hand, are processes that occur during cytokinesis, which is the final stage of cell division.