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Stamen and Pollen Grain Structure

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Questions and Answers

What is the role of the tapetum in the anther?

It helps in the formation of microspores.

It nourishes the developing pollen grains. (correct)

It separates the two thecae of the anther.

It protects the anther from environmental damage.

Which statement correctly describes the microsporangium in flowering plants?

It does not play a role in microspore formation.

It develops into pollen sacs filled with pollen grains. (correct)

It is surrounded by a single layer called the epidermis.

Each lobe contains only one microsporangium.

What kind of structure is a typical angiosperm anther?

Multilobed and dikaryotic

Unilobed and octhecous

Bilobed and dithecous (correct)

Quadrilobed and hexadecuous

During microsporogenesis, what process takes place in the microsporangium?

<p>Meiosis of the sporogenous tissue (C)</p> Signup and view all the answers

What is the structure that attaches the anther to the flower called?

<p>Filament (D)</p> Signup and view all the answers

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Flashcards

Stamen

The male reproductive part of a flower, consisting of filament and anther.

Anther Structure

A bilobed and dithecous structure containing microsporangia, separated by a groove.

Microsporangium

A structure within an anther that develops into pollen sacs filled with pollen grains.

Microsporogenesis

The process where sporogenous tissue undergoes meiosis to form microspore tetrads.

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Tapetum

The innermost layer of the microsporangium that nourishes developing pollen grains.

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Study Notes

Stamen and Pollen Grain Structure

The stamen is comprised of a filament (stalk) and an anther (terminal structure)
The anther is bilobed (dithecous), with two microsporangia (pollen sacs) in each lobe
Microsporangia are layered with epidermis, endothecium, middle layers and tapetum
Tapetum nourishes developing pollen grains
The anther's structure is tetragonal (four-sided)

Microsporogenesis

Sporogenous tissue within microsporangia undergoes meiosis to produce microspore tetrads
Microspore tetrads have a specific ploidy, determined by meiotic divisions

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Description

Explore the intricate structure of stamens and the process of microsporogenesis in flowering plants. This quiz covers the anatomy of the stamen, the components of the anther, and the stages leading to microspore formation. Ideal for students studying botany or plant biology.