Draw well labelled diagram of
A. Transverse section of anther.a. The outermost is the single layer of epidermis.
b. The second layer is endothecium, where cells develop thickenings.
c. Middle layer is of 2-4 cells.
d. Tapetum, the innermost layer which provides nutrition to the developing pollen cells. The cells of tapetum may be multinucleate.
2. There are four pollen sacs.
3. There is a group of compactly arranged homogenous cells called sporogenous tissue in the centre of each sac.