- Which of the following is a characteristic feature of Spiruria nematodes?
- A) Amphids with spiral openings
- B) Well-defined esophagus
- C) Lack of cuticle
- D) Presence of segmented body
Answer: B) Well-defined esophagus
- Spiruria nematodes are primarily known for their:
- A) Parasitic lifestyle
- B) Free-living lifestyle
- C) Both A and B
- D) Symbiotic relationships
Answer: A) Parasitic lifestyle
- Which of the following genera is a representative of the Spiruria class?
- A) Trichinella
- B) Wuchereria
- C) Ascaris
- D) Strongyloides
Answer: B) Wuchereria
- What type of life cycle do most Spiruria nematodes exhibit?
- A) Direct life cycle
- B) Indirect life cycle
- C) Asexual reproduction
- D) Budding
Answer: B) Indirect life cycle
- Which of the following diseases is caused by a Spiruria nematode?
- A) Filariasis
- B) Schistosomiasis
- C) Malaria
- D) Ascariasis
Answer: A) Filariasis
- Spiruria nematodes typically inhabit which type of environment?
- A) Aquatic
- B) Terrestrial
- C) Both A and B
- D) Airborne
Answer: C) Both A and B
- Which structure is primarily used for feeding in Spiruria nematodes?
- A) Mouth with stylet
- B) Pharynx
- C) Cloaca
- D) Anus
Answer: A) Mouth with stylet
- The cuticle of Spiruria nematodes is primarily composed of:
- A) Collagen
- B) Chitin
- C) Keratin
- D) Cellulose
Answer: B) Chitin
- What is a common method of transmission for Spiruria parasites?
- A) Ingestion of eggs
- B) Mosquito bites
- C) Airborne spores
- D) Direct contact
Answer: B) Mosquito bites
- Which of the following is NOT a characteristic of Spiruria nematodes?
- A) Spiral amphids
- B) Lack of a pharyngeal bulb
- C) Segmented body
- D) Smooth cuticle
Answer: C) Segmented body
- Spiruria nematodes can be distinguished from other classes by their:
- A) Thick cuticle
- B) Long esophagus
- C) Both A and B
- D) Smooth body surface
Answer: C) Both A and B
- The life cycle of Spiruria nematodes usually includes:
- A) Multiple larval stages
- B) Direct development
- C) Indirect development
- D) Parasitic stages only
Answer: A) Multiple larval stages
- Which of the following Spiruria nematodes is known to cause lymphatic filariasis in humans?
- A) Wuchereria bancrofti
- B) Strongyloides stercoralis
- C) Enterobius vermicularis
- D) Ascaris lumbricoides
Answer: A) Wuchereria bancrofti
- Which of the following statements about Spiruria nematodes is true?
- A) They are primarily free-living.
- B) They often have complex life cycles.
- C) They are not significant human pathogens.
- D) They lack a cuticle.
Answer: B) They often have complex life cycles.
- Which of the following diseases is associated with the genus Brugia?
- A) Onchocerciasis
- B) Lymphatic filariasis
- C) Schistosomiasis
- D) Ascariasis
Answer: B) Lymphatic filariasis
- The primary host for many Spiruria nematodes is typically:
- A) Amphibians
- B) Mammals
- C) Birds
- D) Reptiles
Answer: B) Mammals
- Which structure in Spiruria nematodes is specialized for sensory functions?
- A) Amphids
- B) Pharynx
- C) Cloaca
- D) Anus
Answer: A) Amphids
- The eggs of Spiruria nematodes are typically:
- A) Large and spherical
- B) Small and elongated
- C) Oval and smooth
- D) Irregular and flat
Answer: B) Small and elongated
- Which Spiruria nematode is known for causing river blindness?
- A) Loa loa
- B) Wuchereria bancrofti
- C) Onchocerca volvulus
- D) Enterobius vermicularis
Answer: C) Onchocerca volvulus
- The primary function of the cuticle in Spiruria nematodes is:
- A) Digestion
- B) Protection
- C) Respiration
- D) Movement
Answer: B) Protection
- Which of the following is a significant agricultural pest from the Spiruria class?
- A) Heterodera
- B) Caenorhabditis
- C) Ascaris
- D) Dirofilaria
Answer: A) Heterodera
- Spiruria nematodes are often studied in laboratories due to their:
- A) Simple body structure
- B) Fast reproductive rate
- C) Both A and B
- D) Their role in human health
Answer: D) Their role in human health
- Which class do Spiruria nematodes belong to within the phylum Nematoda?
- A) Enoplea
- B) Chromadorea
- C) Spiruria
- D) Secernentea
Answer: C) Spiruria
- The amphids in Spiruria nematodes are primarily:
- A) Simple slits
- B) Spiral or circular
- C) Elongated
- D) Absent
Answer: B) Spiral or circular
- Which of the following statements about Spiruria nematodes is FALSE?
- A) They have segmented bodies.
- B) They can be vectors for diseases.
- C) They can be found in various environments.
- D) They often infect humans and animals.
Answer: A) They have segmented bodies.
- What is the primary host for Wuchereria bancrofti?
- A) Mosquitoes
- B) Humans
- C) Dogs
- D) Cats
Answer: A) Mosquitoes
- Which structure in Spiruria nematodes is used for reproduction?
- A) Ovipositor
- B) Pharynx
- C) Cloaca
- D) Anus
Answer: A) Ovipositor
- Which of the following nematodes is primarily found in the tissues of mammals?
- A) Rhabditis
- B) Strongyloides
- C) Dirofilaria
- D) Ascaris
Answer: C) Dirofilaria
- The eggs of Spiruria nematodes are generally:
- A) Laid in the environment
- B) Retained in the female body
- C) Laid in water
- D) Transmitted through blood
Answer: A) Laid in the environment
- Which of the following genera is NOT part of Spiruria?
- A) Brugia
- B) Wuchereria
- C) Caenorhabditis
- D) Onchocerca
Answer: C) Caenorhabditis