Question

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

• A. (i) and (ii)
• B. (ii) and (iii)
• C. (i) and (iii)
• D. (i), (ii) and (iii)

Answer 1

Answer: (A)

A microsporangium or future pollen sac is a cylindrical sac which appears circular in transverse section. It consists of two parts, outer wall and central homogeneous sporogenous tissue. Microsporangial wall has four types of layers — epidermis, endothecium, 1-3 middle layers and tapetum. The outer three layers perform the function of protection in the young anther and mechanism of dehiscence in the ripe anther.