Unicellular Eukaryotes: Protozoa, Algae, and Slime Molds
Test your knowledge of unicellular eukaryotic organisms including protozoa, algae, slime molds, dinoflagellates, and amoebozoa, focusing on their classification, identification, and biological characteristics.
Questions
Which of the following statements is not true for euglena?
- Euglena divides horizontally.
- Euglena possesses a red eyespot.
- Euglena lacks a cell wall.
- Euglena can form a protective wall around itself during unfavourable conditions.
- Euglena's chloroplasts are surrounded by three membranes.
The protozoa commonly known as giant amoeba is
- acanthamoeba
- amoeba
- balamuthia
- chaos
- clydonella
Which of the following amoebozoa occurs predominantly as internal parasites or commensals of various organisms?
- Gephyramoeba
- Conosa
- Paramoeba
- Endamoeba
- Entamoeba
Which of the following dinoflagellates causes harmful algal blooms?
- Alexandrium
- Pfiesteria
- Gonyaulax
- Symbiodinium
- Lingulodinium
Which of the following protists is used to add sparkle to fingernail polishes as well as paints?
- Red algae
- Brown algae
- Slime molds
- Diatoms
- Gonyaulax
Which of the following protists can cause certain diseases in plants?
- Protostelium
- Labyrinthulomycota
- Plasmodiophorids
- Acrasids
- Fonticula
Which of the following slime moulds has been found in eyewash stations?
- Vexillifera
- Himatismenida
- Cochliopodium
- Dermamoeba
- Sappinia
The dictyostelids are commonly known as social amoebae. Which of the following statements does not characterise dictyostelids?
- They form pseudoplasmodium if the food supply is inadequate.
- The slug is capable of responding to light and temperature gradients.
- Dictyostelium is an interesting example of the evolution of cooperation and cheating.
- Only the heterothallic strains of dictostelium can undergo mating.
- Mating is initiated by gametogenesis.
Which of the following amoebozoa is commonly found in the intestines of numerous animals?
- Arcella
- Centropyxis
- Arcellinida
- Copromyxa
- Endolimax
Which of the following statements regarding Entamoeba is FALSE?
- Multi nucleated trophozoites convert into cysts in a process called encystation.
- Entamoeba belongs to Archamoebae.
- The trophozoites of Entamoeba feed primarily on bacteria.
- Entamoeba coli is harmless.
- All Entamoeba species are found in the intestines of the animals that they infect.
Which of the following statements is incorrect regarding algal blooms?
- The freshwater and ocean blooms have been found to be anthropogenic.
- Looms may be observed in freshwater aquariums.
- Freshwater algal blooms are the result of deficiency of nutrients.
- Bright green blooms are a result of cyanobacteria.
- Red tide is a term often used to describe HABs in marine coastal areas.
Maitotoxin is an extremely potent toxin. Which of the following plays a role in its production?
- Gambierdiscus australes
- Gambierdiscus belizeanus
- Gambierdiscus pacificus
- Gambierdiscus toxicus
- Gloeokinium viscum