According to Current Scientific Thinking,true Multicellular Organisms

question 17

Multiple Choice

According to current scientific thinking,true multicellular organisms

• A)descend from several different kinds of unicellular protists,which became multicellular through specialization and cooperation among cells within a colony.
• B)cannot be traced to any existing or fossil intermediate stages; thus,there is no current scientific theory for the process that generated multicellular organisms from unicellular ancestors.
• C)formed through the fusion of several separate species of unicellular protists,who carried out different complementary functions within the evolving organism.
• D)are all descended from a single colonial protist ancestor.