Bdelloidea MCQs January 8, 2026September 30, 2024 by u930973931_answers 30 min Score: 0 Attempted: 0/30 Subscribe 1. What is the primary habitat of Bdelloidea? (A) Freshwater (B) Marine (C) Terrestrial (D) Brackish water 2. Bdelloidea belong to which larger group of organisms? (A) Annelids (B) Cnidarians (C) Rotifera (D) Arthropods 3. Which of the following is a defining characteristic of Bdelloidea? (A) Sexual reproduction (B) Asexual reproduction (C) Presence of a foot (D) Segmented body 4. What is the primary mode of locomotion for Bdelloidea? (A) Crawling (B) Ciliary movement (C) Swimming using flagella (D) Floating passively 5. What type of symmetry do Bdelloidea typically exhibit? (A) Radial symmetry (B) Pentaradial symmetry (C) Asymmetry (D) Bilateral symmetry 6. Which of the following structures do Bdelloidea use for feeding? (A) Tentacles (B) Ciliated corona (C) Specialized jaws (D) Siphons 7. Which of the following is true about the reproductive strategy of Bdelloidea? (A) They are obligate sexual reproducers (B) They can reproduce only during certain seasons (C) They reproduce only through fragmentation (D) They reproduce primarily through parthenogenesis 8. Which of the following genera is classified under Bdelloidea? (A) Brachionus (B) Asplanchna (C) Adineta (D) Monostyla 9. What is a unique feature of the Bdelloidea life cycle? (A) Direct development (B) Presence of larval stages (C) Ability to survive desiccation (D) Continuous reproduction 10. What ecological role do Bdelloidea typically play? (A) Primary producers (B) Consumers and decomposers (C) Predators (D) Keystone species 11. Which type of feeding mechanism do Bdelloidea utilize? (A) Absorptive feeding (B) Predatory feeding (C) Filter feeding (D) Grazing 12. What kind of body plan do Bdelloidea exhibit? (A) Unsegmented (B) Segmented (C) Radially symmetrical (D) Pseudocoelomate 13. Bdelloidea are often found in which type of environments? (A) Alkaline lakes (B) Moist terrestrial habitats (C) Deep-sea environments (D) Coral reefs 14. Which of the following statements about Bdelloidea is true? (A) They are exclusively marine organisms (B) They possess complex nervous systems (C) They have a unique ability to withstand desiccation (D) They are obligate parasites 15. What is the primary function of the foot in Bdelloidea? (A) Attachment to substrates (B) Locomotion (C) Feeding (D) Excretion 16. What type of sensory structures do Bdelloidea possess? (A) Compound eyes (B) Sensory bristles (C) Tentacles (D) Antennae 17. Which type of reproduction can occur in Bdelloidea? (A) Asexual reproduction through parthenogenesis (B) Only sexual reproduction (C) Budding only (D) No reproduction 18. What feature distinguishes Bdelloidea from other rotifers? (A) Their ability to reproduce asexually (B) Their color (C) Their size (D) Their feeding habits 19. What type of larvae do Bdelloidea produce? (A) Free-swimming larvae (B) Directly developed larvae (C) Non-motile larvae (D) Cystic larvae 20. In terms of ecological roles, Bdelloidea primarily serve as what? (A) Predators (B) Primary producers (C) Prey for larger organisms (D) Decomposers only 21. Which of the following is NOT a characteristic of Bdelloidea? (A) Presence of cilia (B) Simple body structure (C) Freshwater habitats (D) Exclusively marine 22. What do Bdelloidea feed on? (A) Larger zooplankton (B) Plant material (C) Microorganisms and organic particles (D) Sediment 23. Which class of Rotifera does Bdelloidea belong to? (A) Monogononta (B) Bdelloidea (C) Digononta (D) Seisonidea 24. What is the main advantage of the ability to withstand desiccation in Bdelloidea? (A) Increased feeding efficiency (B) Survival during unfavorable conditions (C) Enhanced locomotion (D) Greater reproductive success 25. What type of circulatory system do Bdelloidea have? (A) Open circulatory system (B) Closed circulatory system (C) No circulatory system (D) Simple vascular system 26. How do Bdelloidea contribute to nutrient cycling in their environment? (A) By consuming large organisms (B) By breaking down organic matter (C) By producing nutrients (D) By forming symbiotic relationships 27. What type of habitat is most conducive for Bdelloidea? (A) Polluted waters (B) Stagnant waters (C) Clean, moist environments (D) Alkaline lakes 28. Bdelloidea are often studied in relation to which of the following fields? (A) Botany (B) Genetics (C) Microbiology (D) Ornithology 29. Which of the following adaptations helps Bdelloidea survive in their environment? (A) Large size (B) Ability to enter a cryptobiotic state (C) Complex behavior (D) Fast swimming ability 30. What is the primary mode of nutrition in Bdelloidea? (A) Photosynthesis (B) Chemosynthesis (C) Heterotrophic feeding (D) Absorptive feeding