Question

In Amoeba the excretion is done by

• A. Diffusion
• B. Osmosis
• C. Filteration
• D. All of these

Answer 1

The correct option is A

Diffusion

The correct option is A.

Explanation of correct option:

1. In Amoeba, the waste material is ammonia rather than carbon dioxide. It is excreted through the process called diffusion from the surface of the body to the surrounding water. Amoeba has no excretory organs like most multicellular animals.
2. Diffusion is the process of movement of materials from a high concentration area to a low concentration area through the body surface.
3. Amoeba takes the help of vacuole contractile for the diffusion of the waste material out of the body.

Explanation of incorrect options:

Option B: Osmosis is the process of movement of a substance through a semipermeable membrane which is not the case in the excretion process as waste diffuses out when the vacuole comes and contact with the membrane.

Option C: Filtration is the removal of waste or toxins from the body that does not take place in single-celled organisms.

Option D: As options B and C are incorrect, this is an invalid option.

In Amoeba, the excretion is done by diffusion.