The outermost and innermost wall layers of microsporangium in an anther are respectively.
1. Endothecium and tapetum
2. Epidermis and endodermis
3. Epidermis and middle layer
4. Epidermis and tapetum
A typical microsporangium is generally surrounded by four-wall layers, /.e., the epidermis, (outermost protective layer), endothecium, (middle fibrous layers), and the tapetum (innermost nutritive layer).
