bio homework HELP.?

Question

how do mitosis and cytokinesis differ between plant and animal cells?

Answer 1

In respect of spindle formation; in the formation of furrow(contractile belt around equator), animal cells are different.
Plants use dictyosomes(Golgi complex) to form the cell plate to make two daughter cells.Plants do not have the contractile proteins for make the furrow during cytokinesis.

Answer 2

MITOSIS:
In plant cells, due to the difficulty for the nucleus of negotiating a highly-vacuolated cytoplasm, the prophase of mitosis is preceded by pre-prophase.

Pre-prophase is where the nucleus migrates to the centre of the cell and the phragmosome is formed. The phragmosome is a plate of cytoskeleton-rich cytoplasm that holds the nucleus in the middle of the vacuolated cell, and will form the basis for the division of the cytoplasm, after nuclear division.

In higher plants, the cells also lack centrioles, and the nuclear spindle forms from the surface of the nuclear envelope.

So in animals, the stages of mitosis are:
(Interphase), prophase, prometaphase, metaphase, anaphase, telophase, cytokinesis.
In plants, the stages are:
(Interphase), preprophase, prophase, prometaphase, metaphase, anaphase, telophase, cytokinesis.


CYTOKINESIS:
Due to the presence of the cell wall, plant cells to not form a contractile ring to divide the cytoplasm in two. Instead, vesicles migrate to the region where the phragmosome was and fuse into a cell plate, which separates the daughter cells and allows synthesis of a new cellulose cell wall.

Answer 3

In animal cells,the contractile ring contracts and pinches the two daughter cells apart during cytokinesis,while in plant cells the phragmoplast extends to the cell wall on both sides of original cell and new cell wall between two daughter cells is completed.