Updated By SaraNextGen
On January 25, 2024, 11:35 AM

Page No 83: - Chapter 7 Diversity In Living Organisms class 9 ncert solutions Science - SaraNextGen [2024]

Question 1:

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


A primitive organism or lower organism is the one which has a simple body structure and ancient body design or features that have not changed much over a period of time. An advanced organism or higher organism has a complex body structure and organization. For example, an Amoeba is more primitive as compared to a starfish. Amoeba has a simple body structure and primitive features as compared to a starfish. Hence, an Amoeba is considered more primitive than a starfish.


Question 2:

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


It is not always true that an advanced organism will have a complex body structure. But, there is a possibility that over the evolutionary time, complexity in body design will increase. Therefore, at times, advanced organisms can be the same as complex organisms.

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