1. Anther is generally

2. A dithecous anther consists of ---(i)---- microsporangia, ----(ii)---- in each lobe.

3. Which function of tapetum is correct?

4. Which of the following statements regarding the structure of microsporangium are correct?

(ⅰ) Microsporangium is generally surrounded by four wall layers - epidermis, endothecium, middle layers and tapetum.

(ii) Outer three layers perform functions of protection and dehiscence of anthers.

(ii) Cells of tapetum undergo meiosis and produce microspore tetrads.

5. Mature pollen grains are ------- in diameter and ------ layered structures generally.

6.  One of the most resistant biological material present in the exine of pollen grain is

7. Select the correct statement.

8. Which of the following statements about sporopollenin is incorrect?

9. Consider the following statements with respect to pollen grains.

A. The exine is a thin and continuous layer made up of cellulose and pectin.

B. The hard outer layer called the exine is made up of sporopollenin.

C. Sporopollenin is present in germ pores.

D. The exine exhibits a fascinating array of patterns and designs.

Of the above statements;

10. Read the given statements.

(i) Outer exine is made up of sporopollenin.

(ii) Inner intine is pectocellulosic in nature.

(iii) Generative cell is bigger and contains abundant food reserve.

(iv) Vegetative cell is small and floats in the cytoplasm of the generative cell.

Which of the given statements are not true regarding structure of pollen grain?

11. Cells that are found in a pollen grain when it is shed at 3-celled stage are

12. -------- of the pollen grain divides to form two male gametes.

13. Which of the following causes chronic respiratory disorder due to pollen allergy?

14. Which of the following statement is incorrect regarding the advantages of pollen consumption?

15. Nucellus is enclosed by

16. A typical angiospermous ovule is attached to the placenta by means of a stalk called X. Body of the ovule fuses with X in the region called Y. Identify X and Y.

17. Megasporangium along with its protective integuments is called

18.  Consider the following statements and choose the correct option.

A. The ovule is attached to the placenta by means of a stalk called filament.

B. The ovule fuses with the stalk in the region called hilum.

C. The two protective envelopes of ovule are called integuments.

D. The small opening in the tip of ovule is called germ pore.

19. In which of the following plants, ovary contains many ovules?

20. Identify the incorrect statement from the given statements regarding megasporogenesis.

21. Which of the following statements is not correct?

22. The arrangement of nuclei in a typical mature angiosperm embryo sac is

23. Egg apparatus in a typical angiosperm embryo sac is constituted by

24. Select the correct statement(s) regarding the structure of a typical angiospermic embryo sac.

(i) Egg apparatus is situated towards chalazal end.

(ii) Antipodal cells are situated towards micropylar end.

(iii) It is 8-nucleate but 7-celled, at maturity.

25. The female gametophyte of a typical dicot at the time of fertilization is