128
Question
Cytokinesis in an animal cell takes place by _______ method in _______ direction; while in a plant cell it occurs by _______ method in ______ direction.
Cytokinesis in an animal cell takes place by _______ method in _______ direction; while in a plant cell it occurs by _______ method in ______ direction.
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Solution
The correct option is B Furrowing, centripetal, cell plate, centrifugal
In the cytokinesis process, the cell cytoplasm divides to form a new daughter cell from the parent cell. In-plant cell and animal cell the process is different, the difference is following,Plant cell cytokinesis:- During telophase, these Golgi vesicles are transported on microtubules to form a phragmoplast (a vesicular structure) at the metaphase plate. there, the vesicles fuse and coalesce from the center toward the cell walls; this structure is called a cell plate. as more vesicles fuse, the cell plate enlarges until it merges with the cell walls at the periphery of the cell or centrifugal direction to the metaphase plate. enzymes use the glucose that has accumulated between the membrane layers to build a new cell wall.
Animal cell cytokinesis: - In the animal cells the process initiated from anaphase and ends at telophase. as animal cells that lack cell walls, cytokinesis follows the onset of anaphase. a contractile ring composed of actin filaments forms just inside the plasma membrane at the former metaphase plate. the actin filaments pull the equator of the cell inward, forming a fissure. this fissure, or “crack,” is called the cleavage furrow. the furrow deepens as the actin ring contracts, and eventually, the membrane is cleaved in two by the movement of the cell cytoplasm towards the centripetal direction.Thus, the correct answer is (B).
In the cytokinesis process, the cell cytoplasm divides to form a new daughter cell from the parent cell. In-plant cell and animal cell the process is different, the difference is following,
Plant cell cytokinesis:- During telophase, these Golgi vesicles are transported on microtubules to form a phragmoplast (a vesicular structure) at the metaphase plate. there, the vesicles fuse and coalesce from the center toward the cell walls; this structure is called a cell plate. as more vesicles fuse, the cell plate enlarges until it merges with the cell walls at the periphery of the cell or centrifugal direction to the metaphase plate. enzymes use the glucose that has accumulated between the membrane layers to build a new cell wall.
Animal cell cytokinesis: - In the animal cells the process initiated from anaphase and ends at telophase. as animal cells that lack cell walls, cytokinesis follows the onset of anaphase. a contractile ring composed of actin filaments forms just inside the plasma membrane at the former metaphase plate. the actin filaments pull the equator of the cell inward, forming a fissure. this fissure, or “crack,” is called the cleavage furrow. the furrow deepens as the actin ring contracts, and eventually, the membrane is cleaved in two by the movement of the cell cytoplasm towards the centripetal direction.
Thus, the correct answer is (B).
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