what is a structure of A flower ??
Answers
Answer:
Flower
Explanation:
Has petals and has a stem
A flower is basically made up of four concentric rings of structures. There is an outer ring of modified leaves called sepals. These provide protection to the flower before it opens and are usually green. This outer ring is known as the calyx.
Inside the sepals is another ring of modified leaves called petals which are often brightly coloured. This layer is known as the corolla.
Within the corolla are one or more stamens containing pollen, which are the male reproductive structures.
In the very centre of the flower are the female reproductive organs.
The female parts of a flower consist of an ovary, which contains one or more ovules, a style and the stigma. The ovary is at the base of the flower.
From the ovary, extends a tubular structure called the style and on the top of the style is a surface receptive to pollen called the stigma.
The stigma can take many different forms, most of them designed to help trap pollen. There are many variations on this basic structural theme.
The male parts of a flower consist of one or more stamens. Each stamen is made up of paired anthers (sacs containing pollen) on a filament or stalk.
The anthers are the orange/yellow structures often seen in the centre of a flower.
Pollen from the anthers of one flower is transferred to the stigma of another usually either by wind, or by animals, especially insects.
Additional Information :
Flowers do not always have the two outer layers of calyx and corolla. These two layers are most noticeable in plants which are pollinated by insects. The corolla, or petals are often brightly coloured with markings attractive to insects. The flowers may also be scented. For instance, Honeysuckle has showy, attractive flowers which attract insects by day. However, in the dark, their colourful show is not much use, and their heady scent then helps to attract night-flying moths.