- Archiacanthocephala are primarily classified as:
- A) Cnidarians
- B) Arthropods
- C) Acanthocephala
- D) Annelids
Answer: C) Acanthocephala
- The adult form of Archiacanthocephala is typically found in:
- A) Terrestrial environments
- B) Marine environments
- C) Freshwater environments
- D) All of the above
Answer: D) All of the above
- Archiacanthocephala are known for their:
- A) Complex life cycles
- B) Ability to photosynthesize
- C) Segmented bodies
- D) Hard exoskeletons
Answer: A) Complex life cycles
- The primary host for Archiacanthocephala is usually:
- A) Fish
- B) Birds
- C) Mammals
- D) Reptiles
Answer: B) Birds
- The larval stage of Archiacanthocephala is known as:
- A) Cystacanth
- B) Metacestode
- C) Miracidium
- D) Trochophore
Answer: A) Cystacanth
- Archiacanthocephala possess a unique structure called:
- A) Proboscis
- B) Tentacle
- C) Siphon
- D) Mantle
Answer: A) Proboscis
- The body of Archiacanthocephala is characterized by:
- A) Segmentation
- B) Acoelomate structure
- C) A coelomic cavity
- D) An exoskeleton
Answer: B) Acoelomate structure
- Archiacanthocephala typically reproduce through:
- A) Budding
- B) Binary fission
- C) Sexual reproduction
- D) Fragmentation
Answer: C) Sexual reproduction
- The eggs of Archiacanthocephala are often shed into:
- A) Water
- B) Soil
- C) Air
- D) Host tissues
Answer: A) Water
- The primary function of the proboscis in Archiacanthocephala is to:
- A) Aid in locomotion
- B) Attach to the host
- C) Capture prey
- D) Digest food
Answer: B) Attach to the host
- Archiacanthocephala are known to parasitize primarily:
- A) Invertebrates
- B) Vertebrates
- C) Plants
- D) Fungi
Answer: B) Vertebrates
- The body plan of Archiacanthocephala is primarily:
- A) Radially symmetrical
- B) Bilaterally symmetrical
- C) Asymmetrical
- D) Circular
Answer: B) Bilaterally symmetrical
- The digestive system of Archiacanthocephala is:
- A) Complete
- B) Incomplete
- C) Absent
- D) Very complex
Answer: C) Absent
- Archiacanthocephala can be identified by their:
- A) Bright colors
- B) Unique reproductive structures
- C) Elongated bodies with spines
- D) Ability to regenerate
Answer: C) Elongated bodies with spines
- In Archiacanthocephala, the intermediate host is usually:
- A) A mammal
- B) A fish
- C) An insect
- D) A bird
Answer: C) An insect
- The life cycle of Archiacanthocephala often involves:
- A) One host only
- B) Two or more hosts
- C) Direct development
- D) Asexual reproduction
Answer: B) Two or more hosts
- The phylum Archiacanthocephala is known for its:
- A) High diversity
- B) Lack of true tissues
- C) Simple morphology
- D) Complex life cycles
Answer: D) Complex life cycles
- Archiacanthocephala are often studied for their:
- A) Ecological significance
- B) Medical relevance
- C) Evolutionary insights
- D) All of the above
Answer: D) All of the above
- The proboscis of Archiacanthocephala is typically covered with:
- A) Cilia
- B) Hooks or spines
- C) Gills
- D) Tentacles
Answer: B) Hooks or spines
- Archiacanthocephala are primarily found in:
- A) Freshwater
- B) Marine environments
- C) Terrestrial environments
- D) All types of environments
Answer: D) All types of environments
- The primary feeding method of Archiacanthocephala is:
- A) Filter feeding
- B) Absorption through the skin
- C) Predation
- D) Parasitic feeding
Answer: D) Parasitic feeding
- Archiacanthocephala have a body wall that is:
- A) Chitinous
- B) Muscular
- C) Soft and gelatinous
- D) Rigid
Answer: B) Muscular
- The taxonomy of Archiacanthocephala is primarily based on:
- A) Morphological features
- B) Genetic analysis
- C) Behavioral studies
- D) Habitat preferences
Answer: A) Morphological features
- Archiacanthocephala play a role in their ecosystem as:
- A) Decomposers
- B) Predators
- C) Parasites
- D) Primary producers
Answer: C) Parasites
- The term “acanth” in Acanthocephala refers to:
- A) Spine
- B) Hook
- C) Tentacle
- D) Muscle
Answer: A) Spine
- The main advantage of a proboscis with hooks for Archiacanthocephala is:
- A) Enhanced locomotion
- B) Efficient feeding
- C) Better attachment to hosts
- D) Increased reproduction
Answer: C) Better attachment to hosts
- The life stages of Archiacanthocephala are typically:
- A) Well-defined with several larval forms
- B) Limited to adult stages only
- C) Asexual throughout
- D) Fully developed at hatching
Answer: A) Well-defined with several larval forms
- Archiacanthocephala are primarily associated with which type of ecological niche?
- A) Terrestrial
- B) Aquatic
- C) Aerial
- D) Subterranean
Answer: B) Aquatic
- The primary research interest in Archiacanthocephala often includes their role as:
- A) Indicators of environmental health
- B) Sources of new medicines
- C) Agents of disease in hosts
- D) All of the above
Answer: D) All of the above
- Which feature differentiates Archiacanthocephala from other worm-like organisms?
- A) Presence of a circulatory system
- B) Presence of a proboscis with spines
- C) Ability to regenerate
- D) Complete digestive system
Answer: B) Presence of a proboscis with spines