Question

Label the following

• A. A - micropylar end, B - chalazal end, C - synergids, D - egg, E - Ovule, F - Synergids
• B. A - chalazal end, B - micropylar end, C - antipodal cells, D - egg, E - polar nuclei, F - Synergids
• C. A - micropylar end, B - chalazal end, C - polar nuclei, D - ovule, E - egg, F - Filiform apparatus
• D. A - chalazal end, B - micropylar end, C - polar cells, D - polar nuclei, E -egg, F - Synergids

Answer 1

The correct option is B A - chalazal end, B - micropylar end, C - antipodal cells, D - egg, E - polar nuclei, F - Synergids

Given above is the completely labelled diagram of a mature embryo sac. The embryo sac contains 7 cells and shows two ends- micropylar end and chalazal end. 3 cells are present together at the micropylar end which is also the site of entry of the pollen tube in most of the angiosperms. These three cells are the 2 synergids and the egg cell. They are together referred to as the egg apparatus. The chalazal end has 3 cells called the antipodal cells. Lastly, there is a large central cell which consists of two polar nuclei.