Question

Explain the 6 - Kingdom classification . ( 5 marks )​

Answer 1

Answer:

Explanation:

➤ The 6 kingdom classification was proposed by Carl Woese, M.L Wheelis and O.Kandler in 1990.

➤ Here the Kingdom Monera is is divided into two further kingdoms - Archaebacteria and Eubacteria.

➤ The 6 kingdoms are :

1. Archaebacteria
2. Eubacteria
3. Protista
4. Fungi
5. Plantae
6. Animalia

➳ Archaebacteria:

• It is further divided into halobacteria, thermoacidophiles and methanogens.
• They are prokaryotic organisms.
• They lack membrane bound organelles and nuclear envelope.
• They are heterotrophic or chemotrophic.

➳ Eubacteria:

• They are  true bacterial prokarytotic organisms.
• They too lack membrane bound organelles and a nuclear envelope.
• They are autotrophic or heterotrophic.
• Some examples are cyanobacteria, spirilla etc

➳ Protista:

• They are eukaryotic organisms.
• They have membrane bound cell organelles and single or double nuclear envelope.
• Cell wall maybe present or absent.
• They are autotrophic or heterotrophic.
• They are divided into phylums:

1. Phylum pyrrophyta
2. Phylum chrysophyta
3. Phylum euglenophta
4. Slime moulds
5. Phylum mastigophora
6. Phylum sarcodina
7. Phylum sporozoa
8. Phlum ciliophora

• Some examples are euglena, paramecium, amoeba etc

➳ Fungi:

• They are eukaryotic organisms.
• Cell wall is made up of chitin.
• They are heterotrophic or saprophytes.
• They are divided into :

1. Phycomycetes
2. Ascomycetes
3. Basidiomycetes
4. Deuteromycetes

• Some examples are Penicillin, Ustilago, Mucor, Neurospora etc.

➳ Plantae:

• They are eukaryotic organisms.
• They have chloroplasts and membrane bound cell organelles.
• They are autotrophic organisms.
• They are divided into:

1. Thallophyta
2. Bryophyta
3. Pteridophyta
4. Gymnosperms
5. Angiosperms.

• Some examples are Volvox, ulothrix, pteris etc

➳ Animalia:

• They are eukaryotic organisms.
• They lack a cell wall
• They are heterotrophic or holozoic.
• They are divided into phylums:

1. Phylum Porifera
2. Phylum Coelentrata
3. Phylum Ctenophora
4. Phylum Platyhelminthes
5. Phylum Aschelminthes
6. Phylum Anelida
7. Phylum Arthropoda
8. Phylum Mollusca
9. Phylum echinodermata
10. Phylum Chordata

• Some examples are euspongia, Obelia, adamsia, asterias , torpedo etc

Answer 2

Explanation:

Development is a process that creates growth, progress, positive change or the addition of physical, economic, environmental, social and demographic components.