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

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

(a) Draw a labelled diagram of the sectional view of microsporangium of an angiosperm. (b) Explain the development of male gametophyte in the microsporangium.

The innermost wall layer of anther

Draw a labelled diagram of the sectional view of a mature pollen grain in angiosperms. Explain the functions of its different parts.

Draw a labelled diagram of the sectional view of a mature pollen grain of angiosperms. Explain the function of generative cell and vegetative cell

Draw a labelled sectional view of seminiferous tubule of a human male.

Label the parts of the following diagram of the human eye and state the functions of those parts.

The function of innermost layer of pollen sac, tapetum is

Draw a labelled diagram of Frasch process for mining sulpur. State the function of the following in the frasch process. (a) Superheated water (b) Air at high pressure .

The innermost wall layer of microsporangium is called.