Which of the following is NOT Unicellular? (A) Amoeba (B) Spirogyra (C) Plasmodium (D) Paramecium

By BYJU'S Exam Prep

Updated on: September 25th, 2023

Spirogyra is not Unicellular. Spirogyra is a filamentous charophyte green alga of Zygnematales order that goes by the popular names mermaid’s tresses, water silk, and blanket weed. It gets its name from the spiral or helical arrangement of the chloroplasts that distinguishes the genus.

Why Is Spirogyra Not A Unicellular? 

There are more than 400 different species of Spirogyra in the world, and they are typically found in freshwater settings. Spirogyra can reach a length of several centimeters and a breadth of roughly 10 to 100 m.

Spirogyra is free-floating green algae that are present in freshwater like ponds, lakes, etc. Spirogyra is called water silk or pond silk.” They contain an unbranched and filamentous vegetative structure. There are about 400 species of Spirogyra. The genus is named after the specific spiral chloroplast, which is present in the cells of algae.

Spirogyra is photosynthetic in nature and contributes mainly to the total carbon dioxide fixation which is carried out. It increases the oxygen level in their habitat. Many aquatic organisms feed on them.

The following are the traits of single-celled organisms:

  • In unicellular creatures, asexual reproduction is the norm.
  • Eukaryotes or prokaryotes are both possible.


Which of the following is NOT Unicellular? (A) Amoeba (B) Spirogyra (C) Plasmodium (D) Paramecium

Spirogyra doesn’t have a single cell, that why it is not Unicellular. They can be found practically anywhere, from freezing tundra to hot springs. They can move by using whip-like structures.

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