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 protozoa
b. An apicomplexan
c. An algae
d. A diatom
e. A slime mold
Answer: e. A slime mold
Biology & Microbiology
You might also like to view...
Where does binary fission begin?
a. the promoter region b. the metaphase plate c. the septum d. the origin
Biology & Microbiology
Which of the following is not an invasive species?
A) cheatgrass B) purple loosestrife C) ring-necked duck D) Asian longhorned beetle
Biology & Microbiology
During gas exchange, body cells
A) take up CO2 and release O2. B) release O2 to red blood cells. C) increase in size to accommodate the reuptake of O2. D) release CO2 and take up O2.
Biology & Microbiology
A positive urease test in cultures from gastric secretions provides preliminary identification of Helicobacter pylori
Indicate whether the statement is true or false
Biology & Microbiology