Multiple Choice
Which of these groups includes photosynthetic unicellular organisms with flagella and contractile vacuoles?
27. Protists
Eukaryotic Supergroups: Exploring Protist Diversity
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Which of these groups includes parasitic unicellular organisms with a complex of organelles specialized for penetrating host cells and tissues?
A
Diatoms
B
Dinoflagellates
C
Euglenoids
D
Ciliates
E
Apicomplexans
Verified step by step guidance1
Understand the characteristics of each group listed: Diatoms, Dinoflagellates, Euglenoids, Ciliates, and Apicomplexans.
Diatoms are a group of algae known for their silica cell walls and are primarily photosynthetic, not parasitic.
Dinoflagellates are mostly marine plankton, some of which are photosynthetic, and are known for causing red tides, but they are not primarily parasitic.
Euglenoids are a group of flagellated protists, some of which are photosynthetic, and they do not have specialized organelles for penetrating host cells.
Apicomplexans are a group of parasitic protists known for having a complex of organelles at one end of the cell, called the apical complex, which is specialized for penetrating host cells and tissues, making them the correct answer.
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