What is the difference in cytokinesis between plants and animals?

Answer 1

In cells that lack a cell wall (animal cells), the cell pinches into two. In cells that have a cell wall (plant cells), a cell plate forms between the two new cells.

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Cytokinesis in an animal cell occurs by a process called cleavage. A cleavage furrow appears and at the site of the cleavage furrow, the cytoplasm has a ring of microfilaments made of actin associated with molecules of the protein myosin. This ring of proteins will contract causing the furrow to deepen, which will then in turn pinch the cell into two separate cells.

In a plant cell, vesicles containing cell wall material collect at the middle of the parent cell. They will fuse and form a membranous cell plate. This plate will grow outward and it accumulates more cell wall material. Eventually the plate will fuse with the plasma membrane and the cell plates contents will join the parental cell wall. This results in two different daughter cells.

Answer 2

Cytokinesis is the division in two of the cytoplasm. It occurs near or after the end of nuclear division. In animals, the cell membrane folds in all around the cell. From the outside, the cell looks like a half-deflated balloon that has an invisible thread looped around it; as cytokinesis proceeds the thread is increasingly tightened. Really, the tightening is by protein fibers of the cytoskeleton, orientated in various directions just below the cell membrane. Plant cells cannot go through the same process, as the cell wall prevents changes to the cell's shape. Instead, the Golgi body manufactures a plate (middle lamella) of vesicles in a plane between the two daughter-nuclei. This plate spreads out from the center of the cell, eventually abutting against the cell membrane all round the cell in that plane. The cell then lays down a cell wall, replacing callose with cellulose and pectin. To see images, visit: animal

http://219.221.200.61/ywwy/zbsw(E)/picech11-21.jpg

plant

http://porpax.bio.miami.edu/~cmallery/150/mitosissf8x9b.jpg

Answer 3

Because a plant cells are surrounded by the rigid cell wall, it cannot use microfilaments to go through cytokinesis. Instead, it builds a cell plate in the middle of the cell to represent the division.

An animal cell does not have this rigid structure, so it forms a cleavage furrow by pinching the cell in the middle with microfilaments. This will successfully divide the cell into two.

Answer 4

In the cytokinesis of plant cells, a cell plate forms from fragments of the cell wall and develop into a new cell wall, splitting the cell in two. In animal cells, a cleavage furrow forms from a series of microfilaments and contracts like the drawstring of a bag to split the cell.

Answer 5

In plants the cytokinesis takes place by cell plate formation and in animals it is mostly by furrowing of cytoplasm.

Answer 6

it has something to do with contraction