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Question

Why is cleavage not possible in plant cells?


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Solution

Cleavage:

  1. Cleavage is defined as the division of a fertilized egg.
  2. It leads to the formation of an embryo from a zygote.
  3. It takes place only in animal cells.

Division in plant cells:

  1. Since the rigid cell walls of plants cannot be pulled inwards thus cleavage is not possible in plant cells.
  2. As a consequence, in the plant cells, cytokinesis begins roughly halfway between daughter nuclei with the formation of a cell plate in the cytoplasm.
  3. The cell plate is derived from the Golgi complex and the endoplasmic reticulum and is formed by some pectin-containing vesicles.
  4. These vesicles accumulate in the center of the dividing cell and unite together forming a plate of dense cisternae known as phragmoplast, which extends from the center towards the periphery to reach the plasma membrane.

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