Phylum Nemertea MCQs January 8, 2026September 28, 2024 by u930973931_answers 30 min Score: 0 Attempted: 0/30 Subscribe 1. Nemertea is commonly known as what type of organism? (A) Segmented worms (B) Flatworms (C) Roundworms (D) Ribbon worms 2. What type of body symmetry do nemerteans exhibit? (A) Bilateral symmetry (B) Radial symmetry (C) Asymmetry (D) None of the above 3. The body of a nemertean is primarily characterized by: (A) Segmentation (B) A coiled form (C) A hard exoskeleton (D) A smooth and elongated shape 4. Nemerteans are predominantly found in which type of habitat? (A) Terrestrial (B) Freshwater (C) All of the above (D) Marine 5. Which structure is unique to nemerteans? (A) Gills (B) Tentacles (C) Proboscis (D) Antennae 6. What is the primary mode of locomotion for nemerteans? (A) Swimming (B) Crawling (C) Burrowing (D) Floating 7. The proboscis of nemerteans is primarily used for: (A) Feeding (B) Locomotion (C) Respiration (D) Reproduction 8. Which of the following is true about nemertean reproduction? (A) They can reproduce sexually and asexually (B) They reproduce only by budding (C) They are exclusively asexual (D) They do not reproduce 9. Which of the following best describes the nervous system of nemerteans? (A) A diffuse nerve net (B) A simple nerve ring (C) A complex brain and nerve cords (D) Absent 10. Nemerteans primarily feed on: (A) Detritus (B) Algae (C) Plant material (D) Small invertebrates 11. What type of circulatory system do nemerteans possess? (A) Open circulatory system (B) Diffusion-based (C) No circulatory system (D) Closed circulatory system 12. The body cavity of nemerteans is known as: (A) Acoelomate (B) Pseudocoelom (C) Hemocoel (D) Coelom 13. Which of the following statements about nemerteans is true? (A) They have a segmented body (B) They possess a complex digestive system (C) They lack a circulatory system (D) They are exclusively marine 14. Nemerteans are known for their ability to: (A) Fly (B) Regenerate lost body parts (C) Swim rapidly (D) Live in extreme environments 15. The larval stage of nemerteans is referred to as: (A) None of the above (B) Planula (C) Veliger (D) Trochophore 16. What is the primary ecological role of nemerteans? (A) Primary producers (B) Decomposers (C) Predators in marine ecosystems (D) Parasites of other animals 17. In which class are the majority of nemertean species classified? (A) Enoplea (B) Palaeonemertea (C) Heteronemertea (D) Annelida 18. Which of the following is a common habitat for nemerteans? (A) Freshwater lakes (B) Caves (C) Forest floors (D) Marine benthic environments 19. What type of body covering do nemerteans have? (A) Chitinous cuticle (B) Hard shell (C) Soft, moist skin (D) Scales 20. Nemerteans are known to exhibit which type of feeding behavior? (A) Filter feeding (B) Parasitism (C) Herbivory (D) Predation 21. Which of the following structures is used for respiration in nemerteans? (A) Skin (B) Gills (C) Lungs (D) Mantle 22. What is the primary reason for nemerteans’ colorful appearance? (A) Camouflage (B) Attracting mates (C) Warning coloration (D) Thermoregulation 23. Nemerteans can be identified by their: (A) Body segmentation (B) Presence of scales (C) Long, slender bodies (D) Ability to fly 24. Which of the following best describes the reproduction of some nemerteans? (A) They lay eggs only in water (B) They can regenerate and reproduce from fragments (C) They require a partner to reproduce (D) They reproduce only in certain seasons 25. The majority of nemertean species are: (A) Freshwater species (B) Terrestrial species (C) Parasites (D) Marine species 26. What adaptation allows nemerteans to capture prey effectively? (A) Their sharp teeth (B) Their fast swimming ability (C) Their large size (D) Their muscular proboscis 27. The ecological significance of nemerteans includes: (A) Being indicators of water quality (B) Serving as primary producers (C) Contributing to the biodiversity of marine ecosystems (D) All of the above 28. Which class of nemerteans is characterized by having a well-defined proboscis? (A) Enoplea (B) Heteronemertea (C) Palaeonemertea (D) Anopla 29. Nemerteans are classified under which larger group of organisms? (A) Arthropods (B) Spiralia (C) Platyhelminthes (D) Nematodes 30. The evolutionary significance of nemerteans lies in their: (A) Unique feeding mechanisms (B) Development of a true coelom (C) Complexity of their body systems (D) All of the above