Volvox, the green algae illustrated here, is considered a colony. yet some scientists argue that it is more like a multicellular life form. in order for a cell or group of cells to evolve into a multicellular organism, all but one of these events must occur. that is

A)cells are bound together  

B)cells specialize and cooperate  

C)cells form a protective outer sheath  

D)cells have like pairs of chromosomes

The answer is D) because In order for any multicellular organisms to evolve, the cells within that organism MUST specialize and cooperate, bind together somehow, and form a protective outer sheath. That sheath is like your skin. All cells have like pairs of chromosomes whether they are unicellular organisms or multicellular. A characteristic of all living things is the presence of genetic material.