Cephalocarida MCQs December 4, 2025September 28, 2024 by u930973931_answers 30 min Score: 0 Attempted: 0/30 Subscribe 1. Cephalocarida are primarily found in which type of habitat? (A) Freshwater (B) Deep-sea environments (C) Coastal regions (D) Terrestrial ecosystems 2. Which of the following is a key characteristic of Cephalocarida? (A) Well-developed eyes (B) Presence of a carapace (C) Long, segmented antennae (D) Lack of a distinct cephalothorax 3. What is the common name for members of the Cephalocarida class? (A) Horse shrimp (B) Spider shrimp (C) Horseshoe shrimp (D) Sea spiders 4. Cephalocarida possess which type of body symmetry? (A) Radial symmetry (B) Asymmetry (C) Bilateral symmetry (D) Pentaradial symmetry 5. The diet of Cephalocarida primarily consists of: (A) Phytoplankton (B) Detritus and small organisms (C) Larger invertebrates (D) Plant material 6. Cephalocarida have how many pairs of walking legs? (A) 8 pairs (B) 10 pairs (C) 5 pairs (D) 6 pairs 7. Which of the following statements about Cephalocarida is TRUE? (A) They are primarily freshwater organisms. (B) They have a complex larval stage. (C) They are mostly found in shallow waters. (D) They have a reduced body plan. 8. What is the primary mode of locomotion for Cephalocarida? (A) Crawling (B) Burrowing (C) Swimming (D) Flying 9. Cephalocarida belong to which larger group of animals? (A) Mollusca (B) Arthropoda (C) Annelida (D) Echinodermata 10. The eyes of Cephalocarida are: (A) Well-developed and prominent (B) Simple eyes (C) Reduced or absent (D) Compound eyes 11. Cephalocarida reproduce primarily by: (A) Asexual reproduction (B) Budding (C) Fragmentation (D) Sexual reproduction 12. The larval stage of Cephalocarida is known as: (A) Nauplius (B) Zoea (C) Mysis (D) Megalops 13. Which of the following is a characteristic of Cephalocarida? (A) A solid shell (B) Reduced segmentation (C) Presence of a carapace (D) Gills on the thorax 14. The body of Cephalocarida typically includes: (A) A distinct head and thorax (B) A segmented body without a distinct head (C) A fused head and thorax (D) A soft body with no segmentation 15. Which of the following is NOT a feature of Cephalocarida? (A) Lack of a true carapace (B) Presence of compound eyes (C) Segmented body plan (D) Well-developed antennae 16. Cephalocarida primarily inhabit which part of the ocean? (A) Intertidal zones (B) Coral reefs (C) Pelagic zones (D) Benthic zones 17. Which of the following is a known genus of Cephalocarida? (A) Lepidoptera (B) Brine shrimp (C) Hutchinsoniella (D) Daphnia 18. The body plan of Cephalocarida includes how many segments? (A) 10 (B) 15 (C) 12 (D) 20 19. The gills of Cephalocarida are located on which body part? (A) Carapace (B) Abdominal segments (C) Thoracic appendages (D) Head 20. Which statement about the habitat of Cephalocarida is FALSE? (A) They prefer shallow coastal regions. (B) They can survive in extreme temperatures. (C) They are found in dark, deep waters. (D) They live on the seafloor. 21. The mouthparts of Cephalocarida are adapted for: (A) Chewing (B) Sucking (C) Filtering (D) Grasping 22. Cephalocarida are closely related to which group of organisms? (A) Crustacea (B) Hexapoda (C) Myriapoda (D) Chelicerata 23. What type of circulatory system do Cephalocarida possess? (A) Open circulatory system (B) Closed circulatory system (C) Both A and B (D) None 24. Cephalocarida are most commonly found in which ocean? (A) Atlantic Ocean (B) Southern Ocean (C) Indian Ocean (D) Pacific Ocean 25. Which of the following describes the coloration of Cephalocarida? (A) Brightly colored (B) Dark brown or black (C) Transparent or pale (D) Iridescent 26. Cephalocarida are primarily: (A) Terrestrial (B) Aquatic (C) Both B and C (D) Marine 27. What is the primary purpose of the long antennae in Cephalocarida? (A) Locomotion (B) Feeding (C) Sensory perception (D) Breathing 28. Which of the following is a feature of the larval stage of Cephalocarida? (A) They have a hard shell. (B) They resemble adults. (C) They are non-motile. (D) They are planktonic. 29. Cephalocarida are known for their: (A) Simple body plan and low diversity (B) Complexity and diversity (C) Bright colors and patterns (D) Unique shell structure 30. The study of Cephalocarida contributes to our understanding of: (A) Evolutionary biology (B) Terrestrial ecosystems (C) Coral reef ecosystems (D) Atmospheric sciences