class 9 diversity in living organisms notes
Answers
Answer:
•Biodiversity refers to variability.
• The diverse forms of organism need classification
.• The evolutionary history decides the phylogenetic classification.
• H. Whittaker proposed the five kingdom system of classification
• A distinct name is a need for identification.
• Common names are unscientific.
• Binomial nomenclature is scientific naming of organisms.
• Taxonomic hierarchy is the framework of classification which helps in appropriate placing of organisms.
1. Monera• These are prokaryotic, unicellular, autotrophic or heterotropic organisms.
2. Protista• These are unicellular and eukaryotic, autotrophic or heterotrophic organisms.
• They are further classified as protistan algae, slimemoulds, and protozoa.
3. Fungi• Multicellular and eukaryotic organisms having plant like and animal like features. They may be parasitic or saprophytic.
4. Plantae• These are multicellular, eukaryotic and autotrophic organisms. They are further classified.
• Thallophyta – Thallus like body, mostly autotrophic and aquatic.
• Bryophyta – Simple plants with no vascular system. They are amphibious.
• Pteridophytes – They are land plants with true vascular system.
• Gymnosperms – They are land plants bearing naked seeds.
• Angiosperms – They are flowering plants with seeds covered by fruits.
5. Animalia• These are multicellular, eukaryotic and heterotrophic organisms. They are further classified.
• Porifera – Pore bearing organisms.
• Coelenterata – Organisms with hollow gut
.• Platyhelminthes – unsegmented flat worms.
• Nematoda – Unsegmented round worms.
• Annelida – Metamerically segmented worms.
• Arthropoda – These are animals with jointed appendages.
• Mollusca – Soft bodied animals.
• Echinodermata – Spiny skinned animals.
• Chordata – Dorsal nerve cord, notochord and gill slits.
Explanation:
Answer:
Monera
the correct answer