Question

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

Answer 1

Primitive organisms are the organisms that exhibit a very simple and basic cell arrangement, mechanism and structure and no division of labour is observed. Advanced organisms, on the other hand, are the organisms possessing millions of cells that are grouped into various organs performing different functionality such as mammals.

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Answer 2

Answer:

• An organism which has a simple body structure and ancient body design or features that have not changed much over a period of time is called primitive.

• Advanced organisms were once primitive organisms and have been advanced with evolution over time.

• Advanced organisms have acquired more complex structure and body design.

• By classifying organisms, it is easier and more convenient to study their characteristics.