Question

How are primitive organisms different from the so-called advanced organisms? Give one example. [3 MARKS]

Answer 1

Difference : 2 Marks
Example : 1 Mark

$\begin{array}{ccc}\text{Sl.No}& \text{Primitive Organism}& \text{Advanced Organism}\\ i.& \text{An organism which has a simple body}& \text{An organism which has complex body}\\ & \text{structure and ancient body design or}& \text{structure and organisation with a high level}\\ & \text{features that have not changed much over}& \text{of division of labour;by formation of organs}\\ & \text{a period of time is called primitive.}& \text{and organ system is called advanced}\\ & & \text{organisms.}\\ ii.& \text{They evolved much early}& \text{They are comparatively recent}\end{array}$
Example : Amoeba is more primitive than starfish