Across
- 2. The microsporangia develop further and become .............
- 3. The end of the filament is attached to the thalamus or the petal of the flower.
- 4. Tapetum nourishes the developing ............
- 6. As the anthers mature and dehydrate, the microspores dissociate from each other and develop into .............
- 7. In a transverse section, a typical microsporangium appears near ......... in outline.
- 9. The anther is a four-sided (tetragonal) structure consisting of four microsporangia located at the corners,....... in each lobe.
- 10. The process of formation of microspores from a pollen mother cell (PMC) through meiosis is called ............
- 14. The outer three wall layers perform the function of protection and help in .......... of anther to release the pollen.
- 15. The innermost wall layer is the ..........
- 16. Inside each ........... several thousands of microspores or pollen grains are formed that are released with the dehiscence of anther
- 18. The bilobed nature of an anther is very distinct in the .......... section of the anther.
- 19. the long and slender stalk of the stamen called as the .........,
- 20. A typical angiosperm anther is bilobed with each lobe having two theca, i.e., they are ........
Down
- 1. Several hormonal and structural changes are initiated which lead to the differentiation and further development of the ............
- 5. The microspores, as they are formed, are arranged in a cluster of four cells–the ...........
- 8. As each cell of the ............... is capable of giving rise to a microspore tetrad.
- 11. the androecium consists of a whorl of .......... representing the male reproductive organ.
- 12. In the flower the male and female reproductive structures, the androecium and the ............. differentiate and develop.
- 13. As the anther develops, the cells of the sporogenous tissue undergo ............. divisions to form microspore tetrads.
- 17. flowers are morphological and embryological ............ .