Multiple choice

Which of the following organisms live in colonies?

  1. Spirogyra

  2. Volvox

  3. Chlamydomonas

  4. Desmids

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Volvox is a green alga that exists as spherical colonies containing thousands of cells embedded in a gelatinous matrix. Each cell has two flagella, and the colony shows coordinated movement. Spirogyra is filamentous, Chlamydomonas is unicellular, and Desmids are also unicellular - none typically form colonies like Volvox.