Diversity In Living Organisms
1.Classification: Grouping of the animal based on similar and disimilar features.
2.Basis Of Classification: Different characteristic are used to determine the hierarchy of classification.
Primary characteristics that determines the broadest division in classification are independent of any other characteristic.Prokaryotic or Eukaryotic cell organisation is the primary characteristics of classification.Being a unicellular or multicellular organism is the next basic feature of classification.
Next level of classification depend on whether organisms are aototrophic and heterotrophic.
Further classification depend on various levels of the body of these organism.
3.Evolution: The process by which complex form of a simple organism called evolution.
4.Five kingdom System of classification: Five kingdom System was proposed by R.H. Whittaker.He divided all the organisms in five kingdom - Monera, Protista, Fungi, Plantae, Animalia.
Either heterotrophic or autotrophic.
Cell wall may be present or absent.
May be heterotrophic or autotrophic
It may be use cilia or flagella.
Cell wall are composed of chitin.
*Lichens are symbiotic association between algae and fungi.
(iv) Kingdom Plantae:
Cell wall is made up of cellulose.
It is divided into two parts: Cryptogams and Phanerogams.
(v) Kingdom Animalia:
Cell wall absent.
5.Types of Kingdom Plantae:
(i) Cryptogams: The plants whose reproductive organs are very inconspicuous are called 'Cryptogamae.' It is further divided into three parts:
Bryophyta: Bryophyta are the amphibian of plant kingdom because it survive both on land and in water.Their body has not true root, true stem, and true leaves lacking vascular tissue.Example: Funaria.
Pteridophyta: It well differentiated plant body with vascular tissue. Even, First terrestrial plant are pteridophyta.
(ii) Phanerogams: In phanerogams, we place all those plants who bear flowers and seed. They are further divided into two parts:
a. Gymnosperms: In this, plants bear flower and seed but seeds are not lie in seed coat. It is usually perennial. Evergreen and woody. Example: Pinus, deodar.
b. Angiosperms: In this, plants bear flower and seed and seed are also closed in seed coat. Seed contain fruit. Based on number of cotyledons in seed, seed are divided into two types:
6. Kingdom Animalia: These are multicellular heterotrophic and mostly mobile. Further classification is based on extent and type of body design differentiation.
It have marine habitat.
Minimal differentiation with hard exo-skeleton.
Live in water.
Some live in colonies (corals).
Other have solitary life span (hydra).
Body is cylendrical with no real organs.
Pseudocoelom is present.
It is parasitic in nature.
Bilaterally symmetrical body and triploblastic.
No true coelom.
It is either free living or parasitic.
It have bilaterally symmetry.
Reduced coelom and segmentation.
It have open circulatory system.
Bilaterally simmetrical and triploblastic.
Have true body cavity.
Closed circulatory system.
It have various habitats - fresh and marine water as well as land.
Bilaterally symmetrical segmented.
Open circulatory system.
It have largest species (approximately 4000).
Spiny skinned free living.
Triploblastic with coelomic cavity.
Hard calcium corbonate skeleton.
Gill slit are present.
A dorcal hollow nerve and developed triploblastic and coelomate.
It are marine with a notochord that provide a place for muscle to attach for easy movement.
It are bilaterally symmetrical, triploblastic, coelomic and segmented.