________ is an example of a unicellular organism

Explanation

This question is asking for an example of a unicellular organism. A unicellular organism is a living thing that is made up of only one cell. The options given are Amoeba sp., Hydra sp., Ascaris sp., Taenia sp., and Obelia sp. Out of all the options provided, the correct answer is Amoeba sp. Amoeba is a unicellular organism that belongs to the group of organisms known as protozoa. It is a simple organism that moves and feeds by extending its pseudopodia, which are like small arms. Amoeba can be found in freshwater and soil. It is important to note that while all the organisms listed in the options are living things, not all of them are unicellular. Hydra sp., for example, is a multicellular organism that belongs to the group of organisms known as cnidarians. Ascaris sp. and Taenia sp. are also multicellular organisms that belong to the group of organisms known as helminths or parasitic worms. Obelia sp. is a colonial organism that is made up of many individual cells working together. In conclusion, Amoeba sp. is an example of a unicellular organism because it is a living thing that is made up of only one cell.