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What are Plantae? Diversity in Living Organisms Class 9 Science

Plantae Class 9 Science

What is Plantae? Diversity in Living Organisms Class 9 Science

In this article, we will explain the topic Plantae from the ‘Chapter 5 – Diversity in Living Organisms ‘ out for Class 9 Science.

What is Plantae?

Plantae is multicellular eukaryotes having cell walls.

The organisms belonging to this group are autotrophs and makes use of chlorophyll for photosynthesis in order to produce food for themselves.

The following chart shows the classification of organisms in this group.

Plantae Class 9 Science

Watch and learn through visualization, better to understand and easy to learn. Click Class 9 Science for free videos.

Thallophyta:-

  • The organisms belonging to this group do not have well-differentiated body design.
  • These organisms have naked embryos called spores.
  • Examples of organisms belonging to this group are algae, Spirogyra, Ulothrix, Cladophora, and Chara

Plantae Class 9 Science

 

Bryophyta:-

 

  • The organisms belonging to this group are called the amphibians of the plant kingdom.
  • The body of the plant gets differentiated that leads to the formation of stem and leaf-like
  • The organisms belonging to this group has naked embryos that are called spores.
  • These organisms have no specialized tissue for conduction of water and other substances from one part of the body of the plant to other.
  • Examples of organisms belonging to this group are moss (Funaria) and Marchantia.

Plantae Class 9 Science

Watch detailed explanation on Plantae from Diversity in living organisms, click on Science Class 9.

 

Pteridophyta:-

 

  • The bodies of the plants belonging to this group are differentiated into roots, stem, and
  • These organisms have naked embryos called spores.
  • They have specialized tissue that conducts water and other essential substances from one part of the body of the plant to other.
  • Examples of organisms belonging to this group are Marsilea, ferns, and horse-tails.
  • This group of plants is again divided into two broad categories gymnosperms and angiosperms.

 

 

The classification is based upon the following facts:

  • Naked seeds
  • Seeds enclosed in fruits.

Plantae Class 9 Science

Gymnosperms:-

 

The term gymnosperm is derived from two different words. They are

  • gymno– means naked and
  • sperma– means seed.

i.  The plants belonging to this group have naked seeds.

ii. The plants of this group are generally perennial, evergreen and woody.

iii.  Examples of plants belonging to this group are pines and cycas.

Plantae Class 9 Science

Angiosperms:-

 

The term angiosperm is derived from two different words. They are

  • Angio-means covered and
  • Sperma – means seed.
  • The seeds develop inside the organs of the plants that get modified into fruit. They are therefore called flowering plants.
  • The plant embryos present in the seeds have certain structures. They are called cotyledons or seed leaves.
  • These structures emerge and become green during the germination of the seed.
  • Plants whose seeds have a single cotyledon are called monocotyledonous or monocots.
  • Plants whose seeds have two cotyledons are called dicots.

Plantae Class 9 Science

Fig: Ipomoea

Tag: Plantae, Thallophyta, Bryophyta, Pteridophyta, Gymnosperms, Angiosperms, class 9 science

For NCERT Solutions for Science, Maths and Social Science Class 8 Science, click on ICSE/CBSE Class 9.

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