The Signaling Substance Used to Direct the Aggregation of Cells

Multiple Choice

The signaling substance used to direct the aggregation of cells during the Dictyostelium growth cycle indicates:

A) a lack of water within the environment
B) high levels of nutrients are present within the environment
C) low levels of nutrients have led to an energy shortage
D) elevated moisture in the environment threatens survival
E) reduced phosphorous levels in the environment