Correspondingly, which one is example of Bisporic type of embryo sac?
It is also called the Allium type of embryo sac. Therefore, the correct answer is option B. Note: In the tetrasporic type of embryo sac, a single megaspore is formed after meiosis which contains 4 haploid nuclei. It is also called the Peperomia type of embryo sac.
Similarly, what are the three types of embryo sac? Based on the number of megaspores, embryo sacs can be divided into three types: monosporic, bisporic, and tetrasporic (Web Figure 21.3. A). In the monosporic, or Polygonum-type embryo sac, meiosis of the diploid megaspore mother cell in the nucellus produces four haploid megaspores.
Then, what is the difference between Monosporic and Bisporic embryo sac?
There are three types of embryo sacs, monosporic, bisporic and tetrasporic. In the monosporic embryo sac, out of the four megaspores, one megaspore at the chalazal end takes part in the formation of the embryo sac. In the bisporic embryo sac, two megaspores take part in the formation of the embryo sac.
What is meant by Tetrasporic embryo sac?
All the four nuclei of coeno-megaspore participate in the formation of the embryo sac. This type of embryo sac is called as tetrasporic like in Peperomia. The four haploid nuclei of coeno-megaspore undergo two successive mitotic divisions forming 16 nuclei.
