- Which of the following phylum does the earthworm belong to?
- A) Arthropoda
- B) Annelida
- C) Mollusca
- D) Platyhelminthes Answer: B) Annelida
- What is the primary characteristic feature of Annelida?
- A) Segmentation of the body
- B) Radial symmetry
- C) Exoskeleton
- D) Lack of true tissues Answer: A) Segmentation of the body
- What type of body cavity do Annelids possess?
- A) Acoelomate
- B) Pseudocoelomate
- C) Coelomate
- D) Hemocoelomate Answer: C) Coelomate
- Annelids have a circulatory system that is:
- A) Closed
- B) Open
- C) Absent
- D) Partially open Answer: A) Closed
- Which of the following structures is used for locomotion in Annelids?
- A) Cilia
- B) Parapodia
- C) Fins
- D) Wings Answer: B) Parapodia
- The excretory system of Annelids consists of:
- A) Malpighian tubules
- B) Nephridia
- C) Kidneys
- D) Flame cells Answer: B) Nephridia
- The class Polychaeta is distinguished by:
- A) Presence of many chaetae (bristles)
- B) Absence of segmentation
- C) No chaetae
- D) Lack of a head Answer: A) Presence of many chaetae (bristles)
- Which of the following is NOT a class of Annelida?
- A) Oligochaeta
- B) Polychaeta
- C) Hirudinea
- D) Cephalopoda Answer: D) Cephalopoda
- Leeches belong to which class of Annelida?
- A) Polychaeta
- B) Oligochaeta
- C) Hirudinea
- D) None of the above Answer: C) Hirudinea
- The body segmentation in Annelids is called:
- A) Strobilation
- B) Metamerism
- C) Tagmatization
- D) Bilateration Answer: B) Metamerism
- Which of the following Annelids is used in medical treatments for bloodletting?
- A) Earthworm
- B) Leech
- C) Sandworm
- D) Lugworm Answer: B) Leech
- The nervous system of Annelids is typically:
- A) A nerve net
- B) Absent
- C) A ventral nerve cord with ganglia
- D) Centralized with a brain Answer: C) A ventral nerve cord with ganglia
- What type of reproduction is common in most Annelids?
- A) Sexual reproduction
- B) Asexual reproduction
- C) Budding
- D) Fragmentation Answer: A) Sexual reproduction
- Which of the following environments is typical for Polychaetes?
- A) Freshwater
- B) Marine
- C) Terrestrial
- D) All of the above Answer: B) Marine
- Which structure in earthworms aids in soil aeration and digestion of organic matter?
- A) Clitellum
- B) Gizzard
- C) Crop
- D) Nephridium Answer: B) Gizzard
- In Annelids, the coelom is divided by:
- A) Septa
- B) Spicules
- C) Mesoglea
- D) Flagella Answer: A) Septa
- Which organ is used by earthworms to secrete a mucus cocoon for fertilized eggs?
- A) Parapodia
- B) Clitellum
- C) Gizzard
- D) Setae Answer: B) Clitellum
- The respiratory system in aquatic Annelids typically includes:
- A) Gills
- B) Lungs
- C) Tracheae
- D) Skin diffusion Answer: A) Gills
- The term āchaetaeā refers to:
- A) Feeding appendages
- B) Setae or bristles used for movement
- C) Sensory structures
- D) Segments of the body Answer: B) Setae or bristles used for movement
- Which class of Annelids contains primarily terrestrial species?
- A) Oligochaeta
- B) Polychaeta
- C) Hirudinea
- D) Trematoda Answer: A) Oligochaeta
- Which of the following Annelids is known for its role in scientific research?
- A) Polychaetes
- B) Earthworms
- C) Leeches
- D) Tapeworms Answer: B) Earthworms
- Annelids exhibit which type of symmetry?
- A) Radial
- B) Asymmetrical
- C) Bilateral
- D) None Answer: C) Bilateral
- Which of the following is a parasitic member of Annelida?
- A) Sandworm
- B) Leech
- C) Earthworm
- D) Fireworm Answer: B) Leech
- The digestive system in Annelids is:
- A) Absent
- B) A gastrovascular cavity
- C) A complete digestive system with mouth and anus
- D) Extracellular digestion Answer: C) A complete digestive system with mouth and anus
- Annelids play a significant role in which of the following ecosystems?
- A) Soil ecosystems
- B) Coral reefs
- C) Airborne environments
- D) Frozen tundra Answer: A) Soil ecosystems
- The process of regeneration in some Annelids is:
- A) Absent
- B) Highly advanced
- C) Minimal
- D) Only in larvae Answer: B) Highly advanced
- The development of Annelids is typically:
- A) Direct
- B) Indirect with a larval stage (trochophore)
- C) Through metamorphosis
- D) Parthenogenetic Answer: B) Indirect with a larval stage (trochophore)
- Which of the following statements about Oligochaetes is correct?
- A) They are primarily marine.
- B) They have numerous chaetae on each segment.
- C) They possess a clitellum for reproduction.
- D) They lack segmentation. Answer: C) They possess a clitellum for reproduction.
- What is the primary function of parapodia in Polychaetes?
- A) Feeding
- B) Respiration and locomotion
- C) Reproduction
- D) Excretion Answer: B) Respiration and locomotion
- Which of the following is a major advantage of segmentation in Annelids?
- A) Decreased flexibility
- B) Ability to survive in harsh environments
- C) Specialization of body regions
- D) Loss of body parts Answer: C) Specialization of body regions