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

question 3

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.What is the advantage of forming spores?

• A) Spores can mate with other species.
• B) Spores are smaller and can be transported to new habitats.
• C) The spores are photosynthetic.
• D) The spores will eat the other cells.
• E) Spores have flagella and can swim to new habitats.

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