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KCET2026BiologySexual Reproduction in Flowering Plants

Choose the correct sequence of wall layers in a microsporangium of an angiosperm.

Options

  1. AEpidermis, Middle layer, Endothecium, Tapetum
  2. BEpidermis, Endothecium, Middle layer, Tapetum
  3. CEpidermis, Tapetum, Middle layer, Endothecium
  4. DEpidermis, Middle layer, Tapetum, Endothecium

Correct answer

B. Epidermis, Endothecium, Middle layer, Tapetum

Step-by-step solution

A typical microsporangium is generally surrounded by four wall layers. From the outermost to the innermost, the sequence is: 1. Epidermis: The outermost protective layer. 2. Endothecium: The layer just below the epidermis, which helps in dehiscence of the anther. 3. Middle layers: One to three layers of cells that are ephemeral and lie between the endothecium and tapetum. 4. Tapetum: The innermost layer that nourishes the developing pollen grains. Thus, the correct sequence is Epidermis, Endothecium, Middle layer,

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