The plants of which of the following plant kingdoms are known as algae?

The correct option is Thallophyta

Key Points:Concept:

• Based on whether plants have a well-differentiated body and the presence or absence of specialized tissues for transport, and the ability to bear seeds Kingdom Plantae (Plant Kingdom) is can be classified into different divisions.
• Thallophyta
  • The plant body is not differentiated from roots, stems, and leaves.
  • They are commonly called algae.
• Bryophyta
  • These are small terrestrial plants.
  • They show differentiation in the body design, with stem, leaf-like structures, and root-like structures.
• Pteridophyta
  • The plant body is differentiated into roots, stems, and leaves, apart from having a specialized tissue for conduction.
• Gymnosperms
  • Gymnosperms are plants with naked seeds.
• Angiosperms
  • Angiosperms are seed-bearing plants. Seeds develop inside tissues that get modified to form the fruit of the plant. 

Explanation:

• All the plants that lack a well-differentiated body structure belong to the subgroup Thallophyta.
• Thallophytes are commonly known as algae.
• The majority of them are aquatic. 
• It includes the primitive form of plant life.
• They do not have vascular tissues which help in the transportation of water and minerals, hence, they are usually found in moist places.
• Thallophyta is further divided into - Algae and Fungi.
• Chara, Lichen, and Spirogyra are examples of Thallophyta.