Question

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

Answer 1

Hint: Advancement is based on development of specializations, and specialisation occurs where there is more elaboration and hence more complexity.

Complete answer:
Yes, advanced organisms will be the same as complex organisms.
This will happen, because advanced organisms were once primitive organisms and have been advanced with evolution over time, as a result of which advanced characters have been developed.
Complex organisms are multicellular organisms with complex and specialized characters.
The advanced organisms undergo evolutionary changes to acquire more complex features in order to adjust with the environmental changes and demands.
So as the organism advances, it also becomes complex.

 ( Tracing evolution)

Additional Information:
- Since there is a possibility that complexity in design will increase over evolutionary time, it may not be wrong to say that older organisms are simpler, while younger organisms are more complex.
- Complexity increases with evolution.
- Most life forms seen today have arisen by an accumulation of changes in body design that allow the organism possessing them to survive better.

Note:
- Here 'advanced' refers to a newer form that is less like the ancestral species.
- 'Primitive' means an older form that is close to the ancestral species.