- Rhombozoa are primarily known as:
- A) Small marine worms
- B) Parasitic organisms
- C) Decomposers
- D) Symbiotic organisms
Answer: A) Small marine worms
- Which habitat do Rhombozoa primarily inhabit?
- A) Freshwater environments
- B) Terrestrial ecosystems
- C) Marine environments
- D) Deep-sea trenches
Answer: C) Marine environments
- The body structure of Rhombozoa is characterized by:
- A) A segmented body
- B) A simple sac-like form
- C) A rigid exoskeleton
- D) Jointed appendages
Answer: B) A simple sac-like form
- Rhombozoa are typically found living in the:
- A) Intestines of fish
- B) Gills of cephalopods
- C) Sandy substrates
- D) Open ocean
Answer: B) Gills of cephalopods
- The primary mode of reproduction in Rhombozoa is:
- A) Asexual reproduction
- B) External fertilization
- C) Internal fertilization
- D) Budding
Answer: A) Asexual reproduction
- Rhombozoans are classified under which phylum?
- A) Mollusca
- B) Annelida
- C) Rhombozoa
- D) Cnidaria
Answer: C) Rhombozoa
- Which of the following statements about Rhombozoa is TRUE?
- A) They have a complex nervous system.
- B) They exhibit radial symmetry.
- C) They lack specialized organs.
- D) They are a type of mollusk.
Answer: C) They lack specialized organs.
- The larvae of Rhombozoa are called:
- A) Trochophore
- B) Veliger
- C) Free-swimming larvae
- D) Planula
Answer: C) Free-swimming larvae
- Which of the following is a characteristic of Rhombozoa?
- A) Bilateral symmetry
- B) Complete digestive system
- C) Presence of a coelom
- D) Simple body plan with no segmentation
Answer: D) Simple body plan with no segmentation
- Rhombozoa primarily feed on:
- A) Phytoplankton
- B) Small invertebrates
- C) Bacteria and detritus
- D) Plant material
Answer: C) Bacteria and detritus
- The reproductive structures of Rhombozoa are located in:
- A) The proboscis
- B) The body cavity
- C) The gills of their hosts
- D) The tentacles
Answer: B) The body cavity
- Which of the following is NOT a feature of Rhombozoa?
- A) A muscular proboscis
- B) Lack of true tissues
- C) Simple body organization
- D) Marine habitat
Answer: A) A muscular proboscis
- The body of a typical Rhombozoan is divided into:
- A) Head and trunk
- B) Anterior and posterior regions
- C) A single sac-like structure
- D) Segmented sections
Answer: C) A single sac-like structure
- Which structure in Rhombozoa is primarily responsible for locomotion?
- A) Tentacles
- B) Body muscles
- C) Cilia
- D) Proboscis
Answer: C) Cilia
- Rhombozoa are classified as:
- A) Parasitic organisms
- B) Commensals
- C) Predators
- D) Detritivores
Answer: A) Parasitic organisms
- The study of Rhombozoa contributes to our understanding of:
- A) Evolutionary biology
- B) Marine ecology
- C) Parasitology
- D) All of the above
Answer: D) All of the above
- Rhombozoans are often found in association with:
- A) Coral reefs
- B) Bivalve mollusks
- C) Cephalopods
- D) Sea urchins
Answer: C) Cephalopods
- In terms of body size, Rhombozoans are generally:
- A) Microscopic
- B) Small (a few millimeters)
- C) Medium-sized (up to 10 cm)
- D) Large (over 1 meter)
Answer: B) Small (a few millimeters)
- Which of the following methods is used to study Rhombozoa in research?
- A) Genetic analysis
- B) Microscopy
- C) Field surveys
- D) All of the above
Answer: D) All of the above
- Rhombozoa exhibit which type of symmetry?
- A) Radial symmetry
- B) Bilateral symmetry
- C) Asymmetry
- D) None of the above
Answer: C) Asymmetry
- The ecological role of Rhombozoa in marine environments includes:
- A) Prey for larger organisms
- B) Nutrient cycling
- C) Disease vectors
- D) All of the above
Answer: B) Nutrient cycling
- Which of the following statements about Rhombozoa is FALSE?
- A) They have complex reproductive systems.
- B) They can reproduce asexually.
- C) They are found in the gills of certain cephalopods.
- D) They are generally small in size.
Answer: A) They have complex reproductive systems.
- The primary threat to Rhombozoa populations is:
- A) Habitat destruction
- B) Climate change
- C) Overfishing
- D) All of the above
Answer: D) All of the above
- The nervous system of Rhombozoa is considered:
- A) Complex and centralized
- B) Simple and diffuse
- C) Absent
- D) Highly developed
Answer: B) Simple and diffuse
- Rhombozoa can be classified as:
- A) Marine invertebrates
- B) Freshwater organisms
- C) Terrestrial organisms
- D) None of the above
Answer: A) Marine invertebrates
- The primary mode of locomotion in Rhombozoa is through:
- A) Swimming
- B) Crawling
- C) Floating
- D) Gliding
Answer: A) Swimming
- The lifecycle of Rhombozoa typically involves:
- A) Several larval stages
- B) Direct development
- C) A metamorphic phase
- D) None of the above
Answer: A) Several larval stages
- Which of the following organisms are closely related to Rhombozoa?
- A) Annelids
- B) Mollusks
- C) Cnidarians
- D) Arthropods
Answer: A) Annelids
- The classification of Rhombozoa is primarily based on:
- A) Genetic traits
- B) Morphological characteristics
- C) Ecological roles
- D) All of the above
Answer: B) Morphological characteristics
- The significance of studying Rhombozoa includes understanding their:
- A) Evolutionary adaptations
- B) Host-parasite interactions
- C) Role in marine ecosystems
- D) All of the above
Answer: D) All of the above