Page 2 - 2.Lession Notes-Introduction, Classification and Evolution

• Presence of nucleus/ Whether they are made of prokaryotic or eukaryotic
cells.
• Body design – make up of cells(Single-celled/unicellular or Multicellular
organisms)/ Whether the cells occur singly or they are grouped together and
live as an indivisible group.

• Production of food- Whether they produce their own food by photosynthesis or
get their food from outside
• Level of the organization in bodies of organisms carrying out photosynthesis.

• In animals – an organization of one’s body parts, development of body,
specialized organs for different functions

• The characteristics used for classification of plants will be different from the
characteristics used for classification of animals because plants make their
own food and animals get their food from outside.

Classification System

Two-Kingdom Classification- This system was proposed by Carolus Linnaeus who
classified organisms into two types- plants and animals.

Five-Kingdom Classification- This kingdom was proposed by R. H. Whittaker who
divided the organisms into five different classes:

The Five Kingdom classification of living organisms