Final answer:
Volvox is a colonial organism similar to Chlamydomonas and is considered an intermediate step towards multicellularity, displaying cells specialized in various functions within a colonial structure.
Step-by-step explanation:
The Volvox is a colonial organism similar to the unicellular alga Chlamydomonas. These two organisms are often studied together because Volvox may represent a step in the evolution of multicellularity from a Chlamydomonas-like ancestor. Volvox colonies show a division of labor among cells and some specialization, which are characteristics of more complex multicellular life forms. The interconnection of cells within the colony, the coordination in movement, and the differentiation in reproductive capabilities in Volvox offer insights into how multicellular organisms might have evolved from single-celled ancestors. Moreover, the gel-like matrix that holds the cells together and the eyespots used to swim towards light are features that showcase the organism's complexity beyond that of a simple algal cell.