Structure of Microsporangium

Why are angiosperm anthers called dithecous ? Describe the structure of its microsporangium.

In the centre of each microsporangium, there is a group of compactly arranged homogenous cells called

Study the following lists {:("List-I",,"List-II"),("A. Endothecium",,"I. present between the pollen sacs"),("B.Tapetum",,"II. Fibrous thickenings"),("C.Stomium",,"III. Outer layer of microsporangium"),("D. Sporogenous tissue ",,"IV. Nourishes the pollen grains"),("",,"V. Centre of microsporangium"):}

Inner most jacket layer of microsporangium is:

Draw a labelled diagram of a section of an enlarged view of microsporangium of an angiosperm.

Statement -1 : The innermost layer of microsporangium is tapetum. Statement -2 : Glandular tapetum provides nourishment to developing microspores.

Draw and label the enlarged view of microsporangium of an angiosperm . State the function of its innermost wall layer.

(a) Draw a labelled diagram of matured embryo of a dicotyledonous plant. (b) Describe the structure of a matured microsporangium of an angiosperm.