Dictyostelium Discoideum Is an Unusual Organism,one That Straddles the Boundary

question 34

Multiple Choice

Dictyostelium discoideum is an unusual organism,one that straddles the boundary between the unicellular and the multicellular.Its feeding phase consists of individual amoeba-like cells that move independently,feeding on bacteria by phagocytosis.When the food runs out,cells begin to aggregate into a multicelled structure that migrates toward light.The cells differentiate into a base,stalk,and spores; only the spores survive to colonize a new habitat.Dictyostelium discoideum is which of the following?

• A) a heterotroph and detritovore
• B) a heterotroph and autotroph
• C) a detritovore
• D) an autotroph
• E) a heterotroph

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