- Hirudinea is a class within which phylum?
- A) Mollusca
- B) Annelida
- C) Arthropoda
- D) Nematoda
Answer: B) Annelida
- Hirudinea commonly refers to which type of organism?
- A) Earthworms
- B) Leeches
- C) Polychaetes
- D) Planarians
Answer: B) Leeches
- What type of habitat do most Hirudinea inhabit?
- A) Marine
- B) Freshwater
- C) Terrestrial
- D) All of the above
Answer: D) All of the above
- Hirudinea are characterized by the presence of:
- A) Setae
- B) Parapodia
- C) Suction cups
- D) Tentacles
Answer: C) Suction cups
- The primary feeding method of most Hirudinea is:
- A) Filter feeding
- B) Predation
- C) Parasitism
- D) Detritivory
Answer: C) Parasitism
- Which structure do leeches use to attach to their hosts?
- A) Mouth
- B) Clitellum
- C) Setae
- D) Sucker
Answer: D) Sucker
- Hirudinea lack which of the following features?
- A) Clitellum
- B) Body segments
- C) Parapodia
- D) Setae
Answer: C) Parapodia
- The body of Hirudinea is divided into:
- A) Distinct segments
- B) A few large segments
- C) Fused segments
- D) None of the above
Answer: C) Fused segments
- Which of the following is a medical use of Hirudinea?
- A) Bloodletting
- B) Nutrient extraction
- C) Water filtration
- D) Pest control
Answer: A) Bloodletting
- What type of circulatory system do Hirudinea have?
- A) Open circulatory system
- B) Closed circulatory system
- C) No circulatory system
- D) None of the above
Answer: B) Closed circulatory system
- The mouth of a leech is located on the:
- A) Anterior end
- B) Posterior end
- C) Dorsal side
- D) Ventral side
Answer: A) Anterior end
- Which of the following statements about Hirudinea is true?
- A) They are all parasitic.
- B) They have complex eyes.
- C) They can regenerate lost segments.
- D) They lack a nervous system.
Answer: C) They can regenerate lost segments.
- The excretory system of Hirudinea consists of:
- A) Malpighian tubules
- B) Nephridia
- C) Kidneys
- D) None of the above
Answer: B) Nephridia
- Hirudinea are mostly:
- A) Herbivorous
- B) Carnivorous
- C) Omnivorous
- D) Detritivorous
Answer: C) Omnivorous
- The clitellum in Hirudinea is involved in:
- A) Feeding
- B) Respiration
- C) Reproduction
- D) Locomotion
Answer: C) Reproduction
- Which of the following is a common habitat for leeches?
- A) Lakes
- B) Rivers
- C) Swamps
- D) All of the above
Answer: D) All of the above
- The digestive system of Hirudinea is:
- A) Simple
- B) Complex
- C) Incomplete
- D) Absent
Answer: B) Complex
- Hirudinea have a body plan that is:
- A) Bilaterally symmetrical
- B) Radially symmetrical
- C) Asymmetrical
- D) None of the above
Answer: A) Bilaterally symmetrical
- The presence of anticoagulants in Hirudinea helps them to:
- A) Digest food
- B) Prevent blood clotting
- C) Respire underwater
- D) Regenerate body parts
Answer: B) Prevent blood clotting
- Hirudinea reproduce primarily through:
- A) Asexual reproduction
- B) Budding
- C) Sexual reproduction
- D) Fragmentation
Answer: C) Sexual reproduction
- The number of segments in Hirudinea is generally:
- A) Fixed
- B) Variable
- C) Zero
- D) High
Answer: B) Variable
- Leeches are often found in which type of ecosystem?
- A) Terrestrial
- B) Aquatic
- C) Desert
- D) Tundra
Answer: B) Aquatic
- The Hirudinea are part of which subclass of Annelida?
- A) Oligochaeta
- B) Polychaeta
- C) Hirudinea
- D) All of the above
Answer: C) Hirudinea
- What is the primary role of leeches in their ecosystems?
- A) Predators
- B) Decomposers
- C) Parasites
- D) All of the above
Answer: D) All of the above
- Which of the following is a well-known medicinal leech?
- A) Hirudo medicinalis
- B) Lumbricus terrestris
- C) Eisenia fetida
- D) Nereis virens
Answer: A) Hirudo medicinalis
- The reproductive structure of Hirudinea is called:
- A) Oviduct
- B) Clitellum
- C) Seminal vesicle
- D) Ovary
Answer: B) Clitellum
- What type of locomotion do Hirudinea primarily use?
- A) Swimming
- B) Crawling
- C) Burrowing
- D) Both A and B
Answer: D) Both A and B
- Hirudinea have a well-developed:
- A) Circulatory system
- B) Digestive system
- C) Nervous system
- D) All of the above
Answer: D) All of the above
- The skin of Hirudinea is:
- A) Thick and protective
- B) Thin and permeable
- C) Rigid and hard
- D) Covered in scales
Answer: B) Thin and permeable
- Leeches are primarily known for their role as:
- A) Herbivores
- B) Blood-feeding parasites
- C) Filter feeders
- D) All of the above
Answer: B) Blood-feeding parasites