Chapter 7: Diversity in Living Organisms- Exercise- 83

Science

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Chapter 7: Diversity in Living Organisms

Class: IX

Exercise number 83

Question 1

Which organisms are called primitive and how are they different from the so-called advanced organisms?

Answer 1

An organism which has a simple body structure and ancient body features that have not changed much are called primitive organisms. On the other hand, an organism with complex body structure or high level of division of labour, by formation of organs and organ system is called advanced.

Question 2

Will advanced organisms be the same as complex organisms? Why?

Answer 2

Complexity in body design evolves because of necessity to adapt according to the changing

environment. Hence, we can say that a complex organism would be an advanced one; in comparison to a

simple organism.