Which organisms are called primitive and how are they different from the so-called advanced organisms?
Answer:
- Primitive organisms - The organisms having characteristics like simple cellular structure and no division of labour that came into existence earlier are known as "primitive organisms".
- Advanced organisms - The organisms having characteristics like millions of cells and different organ and organ systems that came into existence later are known as "advanced organisms".
For example:
Primitive organisms- Prokaryotic Bacterias, algae etc.
Advanced organisms- Mammals, birds etc.
Primitive organisms are different from Advanced organisms on the basis of nature, number and complexity of cells they possess.
