Flower Pre-Fertilization Anatomy Quiz

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Explain the structure of a stamen and its components.

A stamen consists of two parts - anther and filament. The anther is bilobed with two theca, each containing two microsporangia, while the filament supports the anther.

Describe the structure of a typical microsporangium and its wall layers.

A typical microsporangium is circular in outline and is surrounded by four wall layers - epidermis, endothecium, middle layers, and tapetum. The wall layers provide protection and aid in the dehiscence of the anther.

What is the function of the tapetum in the microsporangium?

The tapetum is a nutritive tissue that provides nourishment to developing pollen. It has dense cytoplasm and more than one nucleus. It also aids in the bi-nucleation of tapetal cells.

Explain how tapetal cells become bi-nucleate and the significance of this process.

<p>Tapetal cells become bi-nucleate when mitosis occurs, but cytokinesis does not take place. This process is significant for the development and nourishment of pollen grains.</p> Signup and view all the answers

What is present in the centre of each microsporangium at the young stage of anther microsporogenesis?

<p>At the young stage, the anther has a group of cells called sporogenous tissue at the centre of each microsporangium.</p> Signup and view all the answers