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Question

1.Compare and contrast the parts of hibiscus and rose flower

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Solution

HIBISCUS FLOWER:-
  • cylax – made up of sepals that protect the bud in infancy and form the base of the flower
  • corolla – made up of showy petals that encase the reproductive organs.
  • Reproductive parts (Corolla, Stamen) that are in turn
  • stamen – that make up the male reproductive parts – in turn made up of the filament that holds up the pollen sacor anther. The anther releases pollen when open.
  • Pistil – The female reproductive parts of a flower. These are also made up of three components
  • Ovary – that finally forms the seed after fertilization
  • Style – a stalk above the ovary
  • Stigma – the farthest extend of the female part of the flower which receives the pollen for fertilization. This is usually sticky and allows pollen to attach.
ROSE FLOWER
Sepals

A protective outer layer, sepals are leaves that are present before the rose blooms. As the flower opens, the sepals spread and make room for the flower to open. The sepals serve as protection while the flower is maturing, protecting it from elements like wind, rain and harsh sunlight. Depending on the species of rose, sepals number either four or five.

Petals

The most familiar aspect of the rose, its petals are modified leaves. As the main part of the rose, the petals are given additional nutrients, which make it possible to develop the rose's signature colors and smell. The petals are designed to be attractive to bees and other wildlife to aid in pollination.

Stigma

Found at the center of the petals, the stigma is the portion of the rose that accepts pollination. It is usually covered in powdery yellow pollen, a substance that contains male sex cells. The stigma is a small lump in the center of the flower. It sits at the end of a hollow tube that leads down the center of the rose.

Styles

Attached to the stigma, the style is the tubular piece on which the stigma sits. It provides an opening through which pollen makes its way to the ovaries. There are normally between 10 and 12 styles per flower, each of which descend to its own ovary.

Ovaries

Rare amongst flowers, the rose features multiple ovaries. The ovaries sit within the rose hips at the base of the bud. The cavity itself is hollow and filled with ovules. The ovules are the structures that produce the female sex cell, the egg. They are arranged in several lines within the rose.


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