Which one of the following statements about life processes in single-celled organisms is not correct?
They require separate organ for food uptake.
Separate organ is not needed for respiration.
Waste of excretory material is produced by these organisms.
They remain in contact with external environment.
Answer is Right!
Answer is Wrong!
This question was previously asked in
UPSC CAPF – 2021
Unlike multicellular organisms which have specialized organs for specific functions, single-celled organisms perform all functions through the mechanisms available within that single cell. Food uptake in organisms like Amoeba occurs through processes like phagocytosis or pinocytosis across the cell membrane, not through a separate organ. Gaseous exchange for respiration and elimination of waste materials occur directly through diffusion across the cell surface, which is in direct contact with the external environment.