Can molds be unicellular? If so, in what conditions and under what classifications can they be unicellular? Solution Yes, slime molds have unicellular and multicelluar in their growth cycles. In the second group, these slime molds having both unicellular and multicellular stages depending on their conditions. According to the conditions,when there is no scarcity of bacteris then slime molds are in single amoeboid cell structures. Also, when there is a scarcity of bacteria, then slime molds aggregate into colonies which later turns into reproductive structures..