- Pliciloricida belongs to which phylum?
- A) Arthropoda
- B) Loricifera
- C) Nematoda
- D) Mollusca
Answer: B) Loricifera
- Pliciloricida are primarily found in which type of environment?
- A) Freshwater lakes
- B) Deep-sea sediments
- C) Forest floors
- D) Coral reefs
Answer: B) Deep-sea sediments
- The body of Pliciloricida is covered by what?
- A) Scales
- B) Lorica
- C) Exoskeleton
- D) Shell
Answer: B) Lorica
- What type of symmetry do Pliciloricida exhibit?
- A) Bilateral symmetry
- B) Radial symmetry
- C) Asymmetry
- D) No symmetry
Answer: A) Bilateral symmetry
- Pliciloricida reproduce through which method?
- A) Asexual reproduction
- B) Sexual reproduction
- C) Budding
- D) Binary fission
Answer: B) Sexual reproduction
- The size of Pliciloricida typically falls within which range?
- A) 1 mm to 3 mm
- B) 100 µm to 500 µm
- C) 5 mm to 10 mm
- D) 50 cm to 1 meter
Answer: B) 100 µm to 500 µm
- Pliciloricida belong to which superphylum?
- A) Ecdysozoa
- B) Lophotrochozoa
- C) Deuterostomia
- D) Protostomia
Answer: A) Ecdysozoa
- Which organ system is absent in Pliciloricida?
- A) Nervous system
- B) Excretory system
- C) Digestive system
- D) Reproductive system
Answer: B) Excretory system
- The primary diet of Pliciloricida consists of:
- A) Algae
- B) Bacteria
- C) Larger animals
- D) Plant material
Answer: B) Bacteria
- What is the primary function of the lorica in Pliciloricida?
- A) Locomotion
- B) Reproduction
- C) Protection
- D) Feeding
Answer: C) Protection
- How do Pliciloricida move?
- A) Cilia
- B) Flagella
- C) Swimming using fins
- D) Crawling using head spines
Answer: D) Crawling using head spines
- Pliciloricida exhibit which type of feeding mechanism?
- A) Suspension feeding
- B) Deposit feeding
- C) Predation
- D) Parasitism
Answer: B) Deposit feeding
- Pliciloricida larvae are typically:
- A) Sessile
- B) Free-swimming
- C) Parasitic
- D) Burrowers
Answer: B) Free-swimming
- Pliciloricida survive in oxygen-depleted environments by:
- A) Anaerobic metabolism
- B) Producing oxygen
- C) Storing oxygen
- D) Filtering oxygen from water
Answer: A) Anaerobic metabolism
- Which type of nervous system do Pliciloricida possess?
- A) Radial nervous system
- B) Ladder-like nervous system
- C) Centralized brain and nerve cord
- D) No nervous system
Answer: B) Ladder-like nervous system
- Pliciloricida larvae resemble which stage in other invertebrates?
- A) Trochophore
- B) Planula
- C) Nauplius
- D) None of the above
Answer: A) Trochophore
- Pliciloricida are considered part of which ecological group?
- A) Decomposers
- B) Carnivores
- C) Herbivores
- D) Microfauna
Answer: D) Microfauna
- The digestive system of Pliciloricida is:
- A) Complete with a mouth and anus
- B) Incomplete with only one opening
- C) Absent
- D) Shared with other organisms
Answer: A) Complete with a mouth and anus
- Pliciloricida are primarily found at what depth in the ocean?
- A) Shallow coastal waters
- B) Mid-ocean range
- C) Deep-sea environments
- D) Surface waters
Answer: C) Deep-sea environments
- Pliciloricida reproduce by:
- A) Fragmentation
- B) Budding
- C) Sexual reproduction
- D) Binary fission
Answer: C) Sexual reproduction
- Which sensory structures do Pliciloricida use to navigate their environment?
- A) Tentacles
- B) Antennae
- C) Sensory bristles
- D) Photoreceptors
Answer: C) Sensory bristles
- Pliciloricida are placed within the kingdom:
- A) Protista
- B) Plantae
- C) Fungi
- D) Animalia
Answer: D) Animalia
- Which of the following best describes the locomotion of Pliciloricida?
- A) Free-swimming
- B) Sessile
- C) Ciliary movement
- D) Crawling using head appendages
Answer: D) Crawling using head appendages
- Pliciloricida’s head spines serve which purpose?
- A) Defense
- B) Feeding
- C) Anchoring to sediments
- D) Reproduction
Answer: C) Anchoring to sediments
- The unique armor-like covering of Pliciloricida is called:
- A) Cuticle
- B) Lorica
- C) Shell
- D) Mantle
Answer: B) Lorica
- Pliciloricida are capable of surviving extreme conditions due to:
- A) Thick exoskeleton
- B) Anaerobic metabolic processes
- C) Ability to hibernate
- D) Photosynthesis
Answer: B) Anaerobic metabolic processes
- In Pliciloricida, fertilization is typically:
- A) External
- B) Internal
- C) Asexual
- D) Budding
Answer: B) Internal
- Which of the following is absent in the anatomy of Pliciloricida?
- A) Excretory organs
- B) Mouth
- C) Nervous system
- D) Sensory structures
Answer: A) Excretory organs
- Pliciloricida larvae are released into:
- A) Open water
- B) Sediment pockets
- C) Host organisms
- D) Reefs
Answer: A) Open water
- What is the ecological role of Pliciloricida in marine ecosystems?
- A) Predators
- B) Decomposers
- C) Parasites
- D) Microdetritivores
Answer: D) Microdetritivores