Regarding the stamen and microsporangium structure, which of the following statements are accurate?
a. A typical stamen consists of a long, slender stalk called the filament and a terminal, generally bilobed structure called the anther.
b. A typical angiosperm anther is bilobed, with each lobe having two theca, a condition known as dithecous.
c. The anther is a four-sided (tetragonal) structure consisting of four microsporangia, two in each lobe.
d. The microsporangia develop further and become pollen sacs.
e. A typical microsporangium is surrounded by four wall layers: the epidermis, endothecium, middle layers, and the tapetum.
f. The outer three wall layers nourish the developing pollen grains.
g. The tapetum performs the function of protection and helps in the dehiscence of the anther.
h. Cells of the tapetum possess dense cytoplasm and generally have more than one nucleus.
