- What is the common name for organisms in the phylum Cycliophora?
- A) Wheel animals
- B) Sea cucumbers
- C) Corals
- D) Jellyfish
Answer: A) Wheel animals
- Cycliophorans are primarily found on which type of organisms?
- A) Fish
- B) Crustaceans
- C) Mollusks
- D) Echinoderms
Answer: B) Crustaceans
- What is the primary habitat of Cycliophora?
- A) Freshwater environments
- B) Terrestrial environments
- C) Marine environments
- D) Deep ocean trenches
Answer: C) Marine environments
- Which of the following structures is characteristic of Cycliophora?
- A) Tentacles
- B) Ctenes
- C) Lophophore
- D) Feeding ring
Answer: D) Feeding ring
- Cycliophorans are considered to be what type of organisms?
- A) Planktonic
- B) Sessile
- C) Free-swimming
- D) Burrowing
Answer: B) Sessile
- The phylum Cycliophora was first discovered in which year?
- A) 1850
- B) 1990
- C) 1985
- D) 2000
Answer: C) 1985
- What is the life cycle of Cycliophora characterized by?
- A) Asexual reproduction only
- B) Sexual reproduction only
- C) Both asexual and sexual reproduction
- D) Parasitic stages
Answer: C) Both asexual and sexual reproduction
- Which of the following describes the body structure of Cycliophorans?
- A) Segmented body plan
- B) Soft-bodied and gelatinous
- C) Rigid and calcareous
- D) Simple and tubular
Answer: D) Simple and tubular
- What is the primary mode of feeding in Cycliophora?
- A) Filter feeding
- B) Predation
- C) Grazing
- D) Absorption
Answer: A) Filter feeding
- Which of the following statements about Cycliophora is TRUE?
- A) They are mostly found in freshwater.
- B) They are parasitic on fish.
- C) They have a complex nervous system.
- D) They are symbiotic with crustaceans.
Answer: D) They are symbiotic with crustaceans.
- What is the defining feature of the class Symbion?
- A) Presence of tentacles
- B) Unique feeding structure
- C) Presence of a lophophore
- D) Ability to regenerate
Answer: B) Unique feeding structure
- How do Cycliophorans attach to their hosts?
- A) Using suckers
- B) By means of a stalk
- C) Adhesive secretions
- D) Penetrating the host’s skin
Answer: B) By means of a stalk
- What is the role of the mouth in Cycliophora?
- A) Respiration
- B) Sensory perception
- C) Food intake
- D) Waste elimination
Answer: C) Food intake
- Which class does the only known species of Cycliophora belong to?
- A) Symbion
- B) Cnidaria
- C) Hydrozoa
- D) Ecdysozoa
Answer: A) Symbion
- The larval stage of Cycliophora is known as:
- A) Planula
- B) Larva
- C) Cypris
- D) Metanauplius
Answer: A) Planula
- Cycliophora have a unique feature in their life cycle known as:
- A) Aurelia phase
- B) Biphasic cycle
- C) Sexual dimorphism
- D) Statocyst development
Answer: B) Biphasic cycle
- Which of the following is a significant characteristic of Cycliophora’s feeding mechanism?
- A) Presence of jaws
- B) Use of tentacles to capture prey
- C) Use of a ciliated feeding structure
- D) Filter feeding using gills
Answer: C) Use of a ciliated feeding structure
- Cycliophorans are most closely related to which of the following groups?
- A) Mollusks
- B) Cnidarians
- C) Annelids
- D) Rotifers
Answer: B) Cnidarians
- The reproductive strategy of Cycliophorans includes which of the following?
- A) Asexual budding
- B) Internal fertilization
- C) External fertilization
- D) Fission
Answer: A) Asexual budding
- Cycliophora are known to live in symbiosis with which type of organism?
- A) Fish
- B) Crustaceans
- C) Seaweeds
- D) Anemones
Answer: B) Crustaceans
- Which of the following is NOT a known habitat for Cycliophora?
- A) On the gills of lobsters
- B) On the shells of crabs
- C) In freshwater lakes
- D) On the bodies of other marine invertebrates
Answer: C) In freshwater lakes
- The primary ecological role of Cycliophora is:
- A) Primary producers
- B) Decomposers
- C) Parasites
- D) Symbiotic partners
Answer: D) Symbiotic partners
- Cycliophora exhibit which type of symmetry?
- A) Bilateral symmetry
- B) Radial symmetry
- C) Asymmetry
- D) Pentaradial symmetry
Answer: A) Bilateral symmetry
- What is the significance of the phylum name “Cycliophora”?
- A) Refers to their habitat
- B) Refers to their feeding structure
- C) Refers to their locomotion
- D) Refers to their reproductive cycle
Answer: B) Refers to their feeding structure
- Which of the following best describes the life cycle of Cycliophora?
- A) Direct development with no larval stage
- B) Complex with multiple larval forms
- C) Biphasic, involving both sexual and asexual reproduction
- D) Only asexual reproduction
Answer: C) Biphasic, involving both sexual and asexual reproduction
- Cycliophora are classified under which major group of animals?
- A) Invertebrates
- B) Vertebrates
- C) Arthropods
- D) Echinoderms
Answer: A) Invertebrates
- The discovery of Cycliophora has contributed to our understanding of:
- A) Evolutionary biology
- B) Marine ecology
- C) Parasitism
- D) All of the above
Answer: D) All of the above
- Cycliophora possess a structure called the:
- A) Lophophore
- B) Gills
- C) Tentacle
- D) Crown
Answer: D) Crown
- What is a potential impact of Cycliophora on their host organisms?
- A) They provide nutrients.
- B) They may compete for food resources.
- C) They cause disease.
- D) They enhance growth.
Answer: B) They may compete for food resources.
- The study of Cycliophora is significant for understanding:
- A) Marine biodiversity
- B) Ecosystem dynamics
- C) Symbiotic relationships
- D) All of the above
Answer: D) All of the above