Arrange the following wall layers of a typical microsporangium in the correct sequence from the innermost to the outermost : A. Endothecium B. Tapetum C. Epidermis D. Middle layers Choose the correct answer from the options given below :

Step-by-step solution

The wall of a typical microsporangium consists of four layers. From the outermost to the innermost, these layers are the epidermis, endothecium, middle layers, and tapetum. The question asks for the sequence from the innermost to the outermost layer: 1. Tapetum (B) - the innermost layer that nourishes the developing pollen grains. 2. Middle layers (D) - 1 to 3 layers of cells situated just outside the tapetum. 3. Endothecium (A) - located outside the middle layers, it helps in the dehiscence of the anther. 4. Epide