- Which of the following is a characteristic feature of Tylenchida nematodes?
- A) Well-defined esophagus
- B) Lack of a cuticle
- C) Distinct tail morphology
- D) Short, stout body
Answer: A) Well-defined esophagus
- Tylenchida 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 Tylenchida order?
- A) Caenorhabditis
- B) Heterodera
- C) Ascaris
- D) Trichinella
Answer: B) Heterodera
- The life cycle of most Tylenchida nematodes typically includes:
- A) A single larval stage
- B) Multiple larval stages
- C) Direct development
- D) Parasitic stages only
Answer: B) Multiple larval stages
- Which of the following diseases is caused by a Tylenchida nematode?
- A) Filariasis
- B) Root-knot disease
- C) Ascariasis
- D) Schistosomiasis
Answer: B) Root-knot disease
- Tylenchida nematodes typically inhabit which type of environment?
- A) Aquatic
- B) Terrestrial
- C) Both A and B
- D) Airborne
Answer: B) Terrestrial
- Which structure is primarily used for feeding in Tylenchida nematodes?
- A) Mouth with stylet
- B) Pharynx
- C) Cloaca
- D) Anus
Answer: A) Mouth with stylet
- The cuticle of Tylenchida nematodes is primarily composed of:
- A) Collagen
- B) Chitin
- C) Keratin
- D) Cellulose
Answer: B) Chitin
- What is a common method of transmission for Tylenchida parasites?
- A) Ingestion of eggs
- B) Soil contamination
- C) Airborne spores
- D) Direct contact
Answer: B) Soil contamination
- Which of the following is NOT a characteristic of Tylenchida nematodes?
- A) Spiral amphids
- B) Long, slender body
- C) Smooth cuticle
- D) Strongly developed esophagus
Answer: A) Spiral amphids
- Tylenchida nematodes can be distinguished from other orders by their:
- A) Thick cuticle
- B) Short esophagus
- C) Both A and B
- D) Pharyngeal bulb
Answer: D) Pharyngeal bulb
- Which of the following Tylenchida nematodes is known to cause root-knot disease in plants?
- A) Meloidogyne
- B) Heterodera
- C) Anguina
- D) Trichodorus
Answer: A) Meloidogyne
- What is the primary host for many Tylenchida nematodes?
- A) Amphibians
- B) Plants
- C) Birds
- D) Reptiles
Answer: B) Plants
- Which of the following statements about Tylenchida nematodes is true?
- A) They are primarily free-living.
- B) They can affect agricultural crops.
- C) They have segmented bodies.
- D) They lack a cuticle.
Answer: B) They can affect agricultural crops.
- Which structure in Tylenchida nematodes is primarily used for sensory functions?
- A) Amphids
- B) Pharynx
- C) Cloaca
- D) Anus
Answer: A) Amphids
- The eggs of Tylenchida 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 Tylenchida nematode is known for causing cyst nematode disease?
- A) Heterodera glycines
- B) Meloidogyne incognita
- C) Globodera
- D) Anguina tritici
Answer: A) Heterodera glycines
- The primary function of the cuticle in Tylenchida nematodes is:
- A) Digestion
- B) Protection
- C) Respiration
- D) Movement
Answer: B) Protection
- Which of the following is a significant agricultural pest from the Tylenchida order?
- A) Heterodera
- B) Caenorhabditis
- C) Ascaris
- D) Dirofilaria
Answer: A) Heterodera
- Tylenchida 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 agriculture
Answer: D) Their role in agriculture
- Which of the following nematodes is primarily found in the roots of plants?
- A) Rhabditis
- B) Meloidogyne
- C) Dirofilaria
- D) Ascaris
Answer: B) Meloidogyne
- Which of the following statements about Tylenchida 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 plants.
Answer: A) They have segmented bodies.
- What is the primary method for controlling Tylenchida nematodes in agriculture?
- A) Chemical pesticides
- B) Crop rotation
- C) Biological control
- D) All of the above
Answer: D) All of the above
- Which structure in Tylenchida nematodes is used for reproduction?
- A) Ovipositor
- B) Pharynx
- C) Cloaca
- D) Anus
Answer: A) Ovipositor
- The eggs of Tylenchida nematodes are generally:
- A) Laid in the environment
- B) Retained in the female body
- C) Laid in water
- D) Transmitted through soil
Answer: A) Laid in the environment
- Which of the following Tylenchida nematodes is known to cause leaf curl disease?
- A) Meloidogyne
- B) Heterodera
- C) Aphelenchus
- D) Anguina
Answer: C) Aphelenchus
- Which of the following is a method used to diagnose Tylenchida infections in plants?
- A) Soil testing
- B) Visual inspection
- C) DNA analysis
- D) All of the above
Answer: D) All of the above
- The primary host for Meloidogyne spp. is typically:
- A) Humans
- B) Animals
- C) Plants
- D) Fungi
Answer: C) Plants
- Which of the following Tylenchida nematodes is commonly used in biological control?
- A) Steinernema
- B) Heterodera
- C) Caenorhabditis
- D) Ascaris
Answer: A) Steinernema
- What is the major impact of Tylenchida nematodes on agriculture?
- A) They promote plant growth.
- B) They cause crop diseases.
- C) They improve soil quality.
- D) They increase biodiversity.
Answer: B) They cause crop diseases.