Phylum Rotifera MCQs January 8, 2026September 28, 2024 by u930973931_answers 12 min Score: 0 Attempted: 0/12 Subscribe 1. Which class of rotifers includes the largest number of known species? (A) Seisonidea (B) Bdelloidea (C) Monogononta (D) Acanthocephala 2. Bdelloid rotifers are best known for which characteristic? (A) Complete absence of males (B) Production of resting eggs (C) Marine-only habitat (D) Parasitic lifestyle 3. Members of Seisonidea are primarily found in association with which organism? (A) Marine crustaceans (B) Crabs (C) Copepods (D) Freshwater algae 4. Which class of rotifers is capable of long-term survival through anhydrobiosis? (A) Seisonidea (B) Monogononta (C) Bdelloidea (D) Digononta 5. Which rotifer class typically reproduces through cyclical parthenogenesis? (A) Bdelloidea (B) Seisonidea (C) Monogononta (D) Digononta 6. Digononta traditionally includes which two groups? (A) Seisonidea and Monogononta (B) Monogononta and Acanthocephala (C) Bdelloidea and Monogononta (D) Bdelloidea and Seisonidea 7. Seisonidea rotifers differ from other classes by being mostly: (A) Symbiotic (B) Free-floating plankton (C) Parasitic (D) Terrestrial 8. Which class of rotifers is entirely composed of females? (A) Digononta (B) Seisonidea (C) Monogononta (D) Bdelloidea 9. The reproductive process of bdelloid rotifers is exclusively: (A) Budding (B) Sexual (C) Asexual (D) Fragmentation 10. Which class is considered the most ancient and least diverse among rotifers? (A) Bdelloidea (B) Seisonidea (C) Monogononta (D) Digononta 11. Monogonont rotifers produce which special type of egg that can resist harsh conditions? (A) Mastax eggs (B) Resting eggs (C) Cystic eggs (D) Amictic eggs 12. Which class of rotifers lacks a well-defined corona in many species? (A) Monogononta (B) Bdelloidea (C) Digononta (D) Seisonidea