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Chapter 2: Problem 7

Whorl of stamens in flower represents (a) Gynoecium (b) Androecium (c) Calyx (d) Corolla

Short Answer

Expert verified
The whorl of stamens in a flower represents the Androecium.

Step by step solution

01

Understanding flower anatomy

There are four key parts to a flower, each with a specific name and role. Gynoecium is the female reproductive part of the flower, while Androecium is the male reproductive part. Calyx is the outermost protective structure, and Corolla is typically made up of the petals which attract pollinators.
02

Determining the role of stamens

Stamens are part of the Androecium. They are the male reproductive structures in a flower and have two main parts: the anther, which produces pollen, and the filament, which supports the anther.
03

Making the correct choice

Based on the anatomy of a flower and understanding the role of the stamens, it can be determined that the whorl of stamens in a flower represents the Androecium.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Androecium
The androecium is the collective term for all the male reproductive organs within a flower. It forms one of the most crucial components in the process of reproduction in flowering plants. The primary function of the androecium is to produce and disperse pollen, which harbors the male gametes necessary for fertilization.

The androecium can consist of a single stamen or multiple stamens, often arranged in a ring around the central female reproductive parts. In some instances, the formation and structure of these stamens play a pivotal role in facilitating effective pollination and consequential reproduction.
Gynoecium
Conversely, the gynoecium represents the female part of the flower, consisting of one or more carpels. Each carpel typically contains an ovary, which bears ovules, and is topped with a style and stigma.

The stigma serves as a receptive surface for capturing pollen, while the style is a slender 'neck' that connects the stigma to the ovary. Once the pollen has landed on the stigma, a pollen tube grows down the style, allowing sperm to reach and fertilize the ovules, which may then develop into seeds.
Stamen Structure
The structure of a stamen is a paramount factor in understanding flower anatomy and reproductive processes. Each stamen typically consists of two main parts: the filament and the anther.

Filament

The filament acts as a stalk to elevate the anther, enabling easier access for pollinators and optimizing the dispersion of pollen.

Anther

Each anther houses microsporangia, wherein pollen grains develop. As the male reproductive organ, the anther strategically releases pollen, which carries the male gametes, when mature.
Pollination
Pollination is the act of transferring pollen grains from the anther of one flower to the stigma of another. This can occur within the same flower, in self-pollinating plants, or between different flowers, which is known as cross-pollination.

Pollination can happen via various agents like insects, wind, water, or animals. When the pollen grain reaches an appropriate stigma, if conditions are favorable, it will begin to germinate, initiating the process of fertilization that leads to the production of seeds.

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Most popular questions from this chapter

After three meiotic divisions in the functional megaspore, the gametophyte (embryosac) has how many cells. (a) 7 cells (b) 4 cells (c) 5 cells (d) 8 cells

Development of embryo takes place at (a) Chalazal end of embryo sac (b) Micropyle end of embryo sac (c) Near the integument of embryo sac (d) All of these

Pollen sacs develop from (a) Microspore (b) Microspore mother cell (c) Microsporangium (d) Megaspore

Which one of the following is correct for Vallisneria? (A) It grows in fresh water. (B) Female flowers or pollen grains reach the surface by long stalk. (C) Male flowers are released on to the surface of water. (D) Pollen grains are carried passively by water currents. (a) Only A (b) Only A and B (c) Only A, B and \(\mathrm{C}\) (d) \(\mathrm{A}, \mathrm{B}, \mathrm{C}\) and \(\mathrm{D}\)

Example of false fruit (a) Apple (b) Strawberry (c) Cashew (d) All of these
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