- Onychophora is commonly known as what type of organism?
- A) Velvet worms
- B) Segmented worms
- C) Roundworms
- D) Flatworms
Answer: A) Velvet worms
- What type of body symmetry do onychophorans exhibit?
- A) Radial symmetry
- B) Bilateral symmetry
- C) Asymmetry
- D) None of the above
Answer: B) Bilateral symmetry
- Which of the following best describes the habitat of onychophorans?
- A) Aquatic environments
- B) Terrestrial environments
- C) Marine environments
- D) Aerial environments
Answer: B) Terrestrial environments
- What is the primary mode of locomotion for onychophorans?
- A) Swimming
- B) Crawling
- C) Flying
- D) Burrowing
Answer: B) Crawling
- Onychophorans possess which unique feature on their bodies?
- A) Gills
- B) Antennae
- C) Lobopods
- D) Tentacles
Answer: C) Lobopods
- Which of the following is a key characteristic of onychophoran anatomy?
- A) Exoskeleton
- B) Chitinous cuticle
- C) Hard shell
- D) Cartilaginous skeleton
Answer: B) Chitinous cuticle
- What type of respiratory system do onychophorans possess?
- A) Gills
- B) Tracheae
- C) Lungs
- D) Cutaneous respiration
Answer: B) Tracheae
- Onychophorans primarily feed on:
- A) Algae
- B) Detritus
- C) Small invertebrates
- D) Plant material
Answer: C) Small invertebrates
- Which structure is used by onychophorans to capture prey?
- A) Mandibles
- B) Chelicerae
- C) Sticky slime glands
- D) Antennae
Answer: C) Sticky slime glands
- What type of reproduction is commonly observed in onychophorans?
- A) Asexual reproduction
- B) Sexual reproduction
- C) Budding
- D) Fragmentation
Answer: B) Sexual reproduction
- Onychophorans are most closely related to which group of animals?
- A) Annelids
- B) Arthropods
- C) Mollusks
- D) Cnidarians
Answer: B) Arthropods
- The life cycle of onychophorans typically includes:
- A) Direct development
- B) Metamorphosis
- C) Larval stages
- D) None of the above
Answer: A) Direct development
- Which of the following best describes the nervous system of onychophorans?
- A) A simple nerve net
- B) A diffuse nerve ring
- C) A pair of cerebral ganglia with ventral nerve cords
- D) Absent
Answer: C) A pair of cerebral ganglia with ventral nerve cords
- What ecological role do onychophorans primarily play?
- A) Primary producers
- B) Herbivores
- C) Predators
- D) Decomposers
Answer: C) Predators
- What is the function of the slime produced by onychophorans?
- A) Locomotion
- B) Defense and prey capture
- C) Respiration
- D) Excretion
Answer: B) Defense and prey capture
- Onychophorans typically have how many pairs of lobopods?
- A) 2-4 pairs
- B) 5-10 pairs
- C) 10-20 pairs
- D) 14-43 pairs
Answer: D) 14-43 pairs
- Which of the following statements about onychophorans is true?
- A) They are all marine species
- B) They have a segmented body
- C) They possess a complex digestive system
- D) They are exclusively freshwater species
Answer: C) They possess a complex digestive system
- Onychophorans are characterized by their ability to:
- A) Fly
- B) Camouflage
- C) Regenerate lost limbs
- D) Live in extreme environments
Answer: C) Regenerate lost limbs
- The diet of onychophorans consists mainly of:
- A) Plant material
- B) Small invertebrates and arthropods
- C) Fungi
- D) Bacteria
Answer: B) Small invertebrates and arthropods
- Which of the following features is NOT found in onychophorans?
- A) True coelom
- B) Chitinous cuticle
- C) Jointed appendages
- D) Lobopods
Answer: C) Jointed appendages
- What type of circulatory system do onychophorans possess?
- A) Open circulatory system
- B) Closed circulatory system
- C) No circulatory system
- D) Diffusion-based
Answer: A) Open circulatory system
- What is the primary ecological significance of onychophorans?
- A) They are indicators of soil health
- B) They help control insect populations
- C) They are primary producers
- D) They decompose organic material
Answer: B) They help control insect populations
- Onychophorans primarily inhabit which type of environment?
- A) Desert
- B) Tropical forests
- C) Arctic tundra
- D) High mountains
Answer: B) Tropical forests
- What distinguishes onychophorans from other invertebrates?
- A) Presence of a hard shell
- B) Development of lobopods
- C) Ability to fly
- D) Their size
Answer: B) Development of lobopods
- Which of the following is a common method of locomotion for onychophorans?
- A) Jet propulsion
- B) Crawling using lobopods
- C) Swimming
- D) Burrowing
Answer: B) Crawling using lobopods
- The main predators of onychophorans include:
- A) Birds
- B) Snakes
- C) Other onychophorans
- D) Large insects
Answer: D) Large insects
- Which feature allows onychophorans to adapt to their moist habitats?
- A) Hard exoskeleton
- B) Ability to store water
- C) Gills for respiration
- D) Mucous secretion for moisture retention
Answer: D) Mucous secretion for moisture retention
- What is the primary composition of the onychophoran exoskeleton?
- A) Calcium carbonate
- B) Chitin
- C) Keratin
- D) Silica
Answer: B) Chitin
- Which of the following best describes the eye structure of onychophorans?
- A) Compound eyes
- B) Simple eyes (ocelli)
- C) No eyes
- D) Faceted eyes
Answer: B) Simple eyes (ocelli)
- The evolutionary significance of onychophorans is that they provide insight into:
- A) The evolution of arthropods
- B) The development of mammals
- C) The history of terrestrial life
- D) The evolution of plants
Answer: A) The evolution of arthropods