Choanoflagellates Are Single-Celled Eukaryotes That Feed on Bacteria

question 40

Multiple Choice

Choanoflagellates are single-celled eukaryotes that feed on bacteria. In the presence of their food bacteria, some choanoflagellates develop 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.

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Definitions:

Watson

John B. Watson, an American psychologist who established the psychological school of behaviorism, emphasizing the study of observable behaviors.

Highly Subjective

Refers to judgments or opinions that are greatly influenced by personal feelings or beliefs rather than by objective facts.

Understanding of Reality

The ability to perceive, interpret, and respond to the external world in an accurate and coherent manner.

Genetically Determined

Traits or conditions that are influenced by genes inherited from one's parents.