Decribe the structures of the embryo sac of an Angiosperm?
Answers
Answer:
The typically mature embryo sac of an angiosperm consists of two ends that are the chalazal end and another one is the micropylar end. At the micropylar end, there are two cells called synergids cells with an egg apparatus. ... In the chalazal end, there is a presence of three antipodal cells
Explanation:
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Answer: A typical mature embryo sac of Angiosperms is a 7-celled and 8-nucleate structure.
(i) At the micropylar end, an egg apparatus is present which consists of an egg cell and 2 synergid cells. Synergids contain filiform apparatus which guides the pollen tube entry into the embryo sac during fertilisation.
(ii) At the chalazal end, three antipodal cells are present.
(iii) In the centre, two polar nuclei are present which get fused prior to fertilisation to form a diploid secondary nucleus.
Hence, 8 nuclei are constituted within 7 cells. Thus, embryo sac is 7-celled and 8-nucleate
Explanation: