Choanoflagellates are single-celled eukaryotes that feed on bacteria. The presence of their food bacteria causes these cells to cluster into multicellular structures in which the individual choanoflagellate cells are attached to one another
Based on this observation, it may be
assumed that:
A. the bacterial cells, or a chemical released
by the bacteria, bind to a receptor on the
plasma membrane of the choanoflagellate
cells.
B. the choanoflagellate cells use cadherins to
attach to each other.
C. the choanoflagellates use integrins to
attach to each other.
D. choanoflagellates are complex
multicellular organisms because they
alternate between single cell and multicellular
states.
A
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