- What is the primary role of protozoa in the ecosystem? a) Producers
b) Consumers
c) Decomposers
d) Both consumers and decomposersAnswer: d) Both consumers and decomposers
- Which of the following protozoa causes malaria? a) Plasmodium
b) Entamoeba histolytica
c) Trypanosoma brucei
d) Toxoplasma gondiiAnswer: a) Plasmodium
- How do protozoa typically reproduce? a) Binary fission
b) Budding
c) Sexual reproduction
d) Both a and bAnswer: d) Both a and b
- Which protozoan parasite causes African sleeping sickness? a) Trypanosoma brucei
b) Giardia lamblia
c) Entamoeba histolytica
d) Toxoplasma gondiiAnswer: a) Trypanosoma brucei
- What is the main vector of the Plasmodium parasite? a) Housefly
b) Tsetse fly
c) Mosquito
d) TickAnswer: c) Mosquito
- Which protozoan is responsible for causing dysentery? a) Trypanosoma cruzi
b) Entamoeba histolytica
c) Plasmodium falciparum
d) Giardia intestinalisAnswer: b) Entamoeba histolytica
- Which of the following is a key ecological role of protozoa? a) Nitrogen fixation
b) Decomposition of organic matter
c) Oxygen production
d) Carbon dioxide absorptionAnswer: b) Decomposition of organic matter
- What type of environment do protozoa predominantly inhabit? a) Terrestrial habitats
b) Aquatic environments
c) Extreme environments
d) None of the aboveAnswer: b) Aquatic environments
- Which group of protozoa is known for having a flagellum for locomotion? a) Ciliates
b) Amoeboids
c) Flagellates
d) SporozoansAnswer: c) Flagellates
- Which of the following protozoa causes toxoplasmosis? a) Giardia lamblia
b) Plasmodium falciparum
c) Toxoplasma gondii
d) Entamoeba histolyticaAnswer: c) Toxoplasma gondii
- What is the primary mode of transmission for the Trypanosoma parasite? a) Contaminated water
b) Bites from infected mosquitoes
c) Ingestion of contaminated food
d) Bites from the tsetse flyAnswer: d) Bites from the tsetse fly
- Which of the following diseases is caused by Giardia lamblia? a) Malaria
b) Giardiasis
c) Dysentery
d) ToxoplasmosisAnswer: b) Giardiasis
- How do protozoa contribute to nutrient cycling in ecosystems? a) By fixing atmospheric nitrogen
b) By decomposing organic matter and recycling nutrients
c) By synthesizing oxygen
d) By producing carbon dioxide for plant photosynthesisAnswer: b) By decomposing organic matter and recycling nutrients
- What is a common characteristic of sporozoans? a) They have flagella
b) They reproduce through spores
c) They are free-living
d) They are photosyntheticAnswer: b) They reproduce through spores
- Which protozoan parasite is responsible for Chagas disease? a) Plasmodium falciparum
b) Trypanosoma cruzi
c) Entamoeba histolytica
d) Toxoplasma gondiiAnswer: b) Trypanosoma cruzi
- What form of reproduction is common in many protozoa? a) Binary fission
b) Fragmentation
c) Budding
d) Sexual reproduction onlyAnswer: a) Binary fission
- What role do protozoa play in aquatic food webs? a) They act as primary producers
b) They serve as herbivores and consumers of bacteria
c) They are decomposers of dead matter
d) They are the top predatorsAnswer: b) They serve as herbivores and consumers of bacteria
- Which of the following protozoa causes the disease “Amoebic dysentery”? a) Plasmodium
b) Trypanosoma brucei
c) Entamoeba histolytica
d) Toxoplasma gondiiAnswer: c) Entamoeba histolytica
- What is the primary method of transmission for Giardia lamblia? a) Mosquito bites
b) Contaminated food and water
c) Infected blood transfusions
d) Contact with infected animalsAnswer: b) Contaminated food and water
- Which protozoan is commonly associated with the “swimmer’s itch”? a) Toxoplasma gondii
b) Giardia lamblia
c) Schistosoma
d) Plasmodium falciparumAnswer: c) Schistosoma
- What type of protozoan is responsible for malaria? a) Flagellates
b) Ciliates
c) Sporozoans
d) AmoeboidsAnswer: c) Sporozoans
- Which of the following is NOT a common symptom of malaria caused by Plasmodium? a) Fever
b) Muscle pain
c) Abdominal pain
d) Severe diarrheaAnswer: d) Severe diarrhea
- Which of the following protozoa is NOT typically found in human intestines? a) Entamoeba histolytica
b) Giardia lamblia
c) Plasmodium falciparum
d) Trichomonas vaginalisAnswer: c) Plasmodium falciparum
- What is the primary mode of transmission for Toxoplasma gondii? a) Infected food
b) Contact with feces of infected cats
c) Mosquito bites
d) Infected blood transfusionsAnswer: b) Contact with feces of infected cats
- Which group of protozoa uses cilia for movement? a) Flagellates
b) Ciliates
c) Sporozoans
d) AmoeboidsAnswer: b) Ciliates
- How does the malaria-causing Plasmodium parasite enter the human body? a) Through ingestion of contaminated food
b) By mosquito bite
c) By direct contact with infected blood
d) Through skin exposure to contaminated waterAnswer: b) By mosquito bite
- Which ecological role do protozoa play in nutrient cycling in freshwater ecosystems? a) They serve as primary producers
b) They decompose detritus
c) They contribute to nitrogen fixation
d) They contribute to phosphorus cyclingAnswer: b) They decompose detritus
- Which protozoan parasite causes a disease called “Kala-azar”? a) Leishmania
b) Trypanosoma cruzi
c) Plasmodium
d) Giardia lambliaAnswer: a) Leishmania
- What are the main vectors for the transmission of Leishmania parasites? a) Mosquitoes
b) Tsetse flies
c) Sandflies
d) HousefliesAnswer: c) Sandflies
- What is a characteristic feature of amoeboid protozoa? a) Presence of flagella
b) Presence of cilia
c) Ability to form pseudopodia for movement
d) Formation of sporesAnswer: c) Ability to form pseudopodia for movement