Question

Which living organism has a primitive structure and which one has an advanced? (Bacteria; Animal)

Answer 1

ANSWER: Bacteria are prokaryotic organisms which means they do not have membrane bound cell organelles such as Golgi apparatus, Endoplasmic reticulum and a well defined nucleus.

• Prokaryotic organisms like Bacteria are unicellular.
• Bacteria do not have higher level of differentiation of cells into tissues and organs.
• Bacteria can be autotrophic or Heterotrophic.
• Bacteria are representative of primitive organsisms on earth.

Whereas animals are representative of advanced level of body organization.

• In animals cells are differentiated into tissues and organs which perform a specific function.
• Contrary to primitive organisms like Bacteria, body organization may range from multicellular level to organ system level.
• Locomotion and movement is also one of the distinct features of animals.

​​​​​​​​​​​​​​The advancement from such a primitive unicellular organsim to a highly advanced organsims, for example humans is probably a result of evolutionary process.