Diversity in living organisms

What do you mean by biodiversity? Biodiversity means the existence of a wide variety of species or other taxa of plants, animals and micro-organisms in a natural habitat within a specific environment. Why do we classify organisms?

Diversity in living organisms

Each organism is different from all other organisms. Greek thinker Aristotle classified animals according to whether they lived on land, in water or in air. This classification is a landmark in ideology, but has limitations. In fact they are different from each other. The Whittaker proposed five kingdoms: Monera, Protista, Fungi, Plantae and Animalia.

Diversity in living organisms

Carl Woese introduced by dividing Monera into Archaebacteria and Eubacteria. They have unicellular, Prokaryotic organisms do not have defined nucleus or organelles. The cell wall may or may not present. The mode of nutrition is autotrophic synthesizing food on their own or heterotrophic getting food from environment.

Please refer to Fig. They have unicellular eukaryotic organisms do have well defined nucleus or organelles. The body is covered by cilia, flagella for locomotion. The mode of nutrition is autotrophicorheterotrophic.

Chapter 7 Diversity in Living Organisms | Class 9, NCERT Solutions, Science

These are multi-cellular eukaryotic organisms with cell wall, made up of Chitin. They do not perform Photosynthesis heterotrophicSaprophytic derive nutrition from decaying material. Aspergillus, Penicillium, Mushroom, Rhizopus. The fungi living with algae forms Lichen Symbiotic Association.

These are multi-cellular eukaryotic organisms with cell wall, made up of Cellulose. Able to perform photosynthesis autotrophic.

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These are multi-cellular eukaryotic organisms without cell wall. They are not able to perform photosynthesis heterotrophic. Ex Human beings, Peacock. The plant body is differentiated into roots like, stem like and leaf like structures. No specialized tissues for the conduction of water and food.

The plant body is differentiated into root, stem and leaf. Specialized tissues for the conduction of water and food are developed in these plants. The reproductive organs are inconspicuous. They areusually perennial, evergreen and woody.

Pinus, Cycas Please refer to Fig. Please refer to Fig 7. These are Eukaryote, multicultural and hetero-tropic. The canal system helps in circulating water, food, oxygen. They are non-motile with cellular level of organization and mainly marine organisms with hard outer coat called as Skeleton.

They are commonly called as Sponges. Spongilla, Sycon Please refer Fig. They are radially symmetrical, Diploblastic two layers of cellscommonly called as Cnidarians Stinging cells for protection are present in the body.

Hydra, Sea Anemone Please refer Fig. They are bilaterally symmetrical Triploblastic three layers ofcellseither free-living or parasitic.Diversity in Living Organisms Part 3 (Basis of classification aristotle) Diversity in Living Organisms Part 4 (Evolution) Diversity in Living Organisms Part 5 (Evolution).

Diversity of organisms. The total number of species living on the planet is imprecisely known and published estimates vary from 12 million to over million. What is species diversity? The word biodiversity is primarily associated with the diversity of living organisms, meaning the abundance of different animal, plant and microbial species.

The diversity we see today is the result of billion years of organic evolution. During the course of this evolution several species vanished from the surface of the Earth and became extinct. It is estimated that more than fifty times the existing species have become extinct. Diversity in living organisms Divyam Presentation cell. DIVERSITY IN LIVING ORGANISMS - DIVERSITY IN LIVING ORGANISMS INTRODUCTION Every organism whether plant or animal is unique in itself. There is a wide diversity in the flora (plants) and fauna | PowerPoint PPT presentation | free to view. May 20,  · Diversity in Living Organisms. Biologists such as Ernst Haeckel, Robert Whittaker and Carl woese have tried to classify all living organism into broad categories called kingdom. The classification which Whittaker proposed has five kingdoms: monera, protista, fungi, plantae and animals.

Originally Answered: How can diversity of proteins in living organisms be explained? Proteins are of two types- globular and fibrous. Globular proteins are linked with functional part like enzymes, hormones, antibodies, Hemoglobin etc.

Ecosystems and Living Organisms Raven05 3/1/03 AM Page erate introduction of the Nile perch, a large and voracious Biologists try to make sense of the remarkable diversity of life that has evolved on Earth by arranging organisms into logical groups.

For hundreds of years, biologists. In order to discuss why living organisms are so diverse it is firstly important to discuss what diversity actually is.

By dictionary definition biodiversity, the diversity of living organisms, is “the variety of plant and animal life in the world or a particular habitat.”(Compact Oxford .

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