NEETBotanySexual Reproduction in Flowering Plants
Read the following statements regarding the development and structure of a typical angiosperm embryo sac. Choose the incorrect statement.
Options
- ASix of the eight nuclei in a typical mature embryo sac are surrounded by cell walls and organised into cells.
- BThe filiform apparatus represents special cellular thickenings present at the micropylar tip of the synergids.
- CDuring the cellularisation of the embryo sac, all eight nuclei become surrounded by distinct cell walls to for
- DThe large central cell is situated below the egg apparatus and contains two polar nuclei.
Correct answer
C. During the cellularisation of the embryo sac, all eight nuclei become surrounded by distinct cell walls to for
Step-by-step solution
According to NCERT, after the 8-nucleate stage of the embryo sac, cell walls are laid down leading to the organisation of the typical female gametophyte. Six of the eight nuclei are surrounded by cell walls and organised into cells (three forming the egg apparatus and three forming the antipodals). The remaining two nuclei, called polar nuclei, are situated below the egg apparatus in the large central cell and are not individually enclosed by cell walls. Therefore, the statement claiming that all eight nuclei becom