What is the purpose of the "floats" in some brown algae?

What do a carnivorous dinoflagellate, a parasitic apicomplexan, and a ciliate have in common?

Which organisms are capable of producing a "red tide"?

Which of these groups includes parasitic unicellular organisms with a complex of organelles specialized for penetrating host cells and tissues?

Which of these groups is characterized by cells that have more than one nucleus?

__________ is a protist that causes late blight of potatoes and was responsible for the Irish potato famine of the 19th century.

In lab class, a plasmodial slime mold is used as a demonstration organism. One of the students does not understand why this organism is not considered multicellular. How would you explain it to her?

Which of the following organisms is commercially harvested to extract algin from their cell walls?

Which of these groups includes unicellular organisms that, due to the structure of their cell walls, can withstand pressures equal to the pressure under each leg of a table supporting an elephant?