Class 6 Science Chapter 7 Getting to Know Plants, Flowers, Functions of Flowers, Whorls (For CBSE, ICSE, IAS, NET, NRA 2022)

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Getting to Know Plants

Flowers

  • It is the reproductive part of the plant.
  • It is also beautiful and colourful part of a flowering plant.
Different Parts of a Flower

Stigma

  • It is the sticky end at the top of the style.
  • It is vital for the process of reproduction in flowering plants.

Style

  • It is the tubelike structure through which stigma is attached.
  • It provides pathway to the pollen grains.
  • It supports the stigma and connects it to the ovary.

Sepal

  • It is the outer green leafy structure in a flower.
  • It protects the flower at bud stage.

Ovary

  • It is the lower broader portion of the pistil.
  • It consists of ovules which take part in reproduction.

Receptacle

  • An area where a flower binds itself to the stalk.
  • It often becomes part of the fruit after the fertilization process.

Filament

  • One of the male reproductive parts of the plant.
  • It attaches the anther to the stem of the flower and also supports it.

Anther

  • The part of the stamen where pollen is produced.
  • It contains microsporangia.

Pistil

The ovule producing part of a flower.

Functions of Flower

  • Provides nectar to certain birds and insects.
  • The ovary of the flower develops into a fruit after fertilization process.
  • Reproduction is the most important function of flowers.
  • Diaspores can be produced from flowers without fertilization.

Whorls

  • The four whorls are responsible for the radial arrangement of a flower.
  • Calyx, Corolla, Stamens and Carpels are the four whorls.
Whorls-Sepals, Petals, Stamens and Carpels

Calyx

It is the outermost whorl of a flower consisting of sepals, tiny leaves present at the base of the flower.

Corolla

It contains petals to attract pollinators and protect the reproductive parts of a flower.

Stamens

  • It is the male reproductive part consisting of a filament with a thread-like structure.
  • Anther produces pollen which contributes to the male reproductive process of the plant.

Carpels

  • It contains the pistil which is the female reproductive part of the flower.
  • It consists of the ovary, style, and stigma.

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