how are the cell arrange in the embryo sac
Answers
Answer:
The embryo sac is female gametophyte of the flowering plant. The cells of the embryo sac are arranged in following manners: Two nuclei are formed when the 'nucleus of the functional megaspores' (n) divides mitotically which results in formation of two nucleated embryo sac.
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Two nuclei are located in two synergid cells that encircle the egg cell. The synergids and the egg cell together make up the egg apparatus.
Explanation:
A mature embryo sac is a 7-cell and 8-nucleate structure. The 8 nuclei are arranged in a precise position. One nucleus is located in the egg cell near the opening of the embryo sac. Two nuclei are located in two synergid cells that encircle the egg cell. The synergids and the egg cell together make up the egg apparatus. Two nuclei are located in a single cell called the central cell, which is present in the middle of the embryo sac and is called the polar nuclei. The other three nuclei are in cells called antipodals, which are located at the end of the embryo sac, opposite to the egg cell. Thus, the embryo sac is made up of egg, central cell, and antipodal cells.
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