- What is the primary characteristic that distinguishes cephalopods from other mollusks?
- A) Two shells
- B) Tentacles with suckers
- C) Radula
- D) Gills
Answer: B) Tentacles with suckers
- Which of the following is NOT a member of the class Cephalopoda?
- A) Octopus
- B) Squid
- C) Clam
- D) Cuttlefish
Answer: C) Clam
- How do cephalopods primarily move?
- A) Crawling
- B) Jet propulsion
- C) Burrowing
- D) Swimming with fins
Answer: B) Jet propulsion
- Which cephalopod is known for its ability to change color and texture?
- A) Squid
- B) Octopus
- C) Cuttlefish
- D) All of the above
Answer: D) All of the above
- The ink sac in cephalopods serves what primary purpose?
- A) Digestion
- B) Defense
- C) Respiration
- D) Reproduction
Answer: B) Defense
- What type of circulatory system do cephalopods have?
- A) Open circulatory system
- B) Closed circulatory system
- C) No circulatory system
- D) Simple diffusion
Answer: B) Closed circulatory system
- Which of the following cephalopods is known for its large brain?
- A) Squid
- B) Octopus
- C) Nautilus
- D) Cuttlefish
Answer: B) Octopus
- Cephalopods are primarily:
- A) Herbivores
- B) Carnivores
- C) Detritivores
- D) Omnivores
Answer: B) Carnivores
- Which structure is responsible for the unique movement of cephalopods?
- A) Tentacles
- B) Fins
- C) Mantle
- D) Siphon
Answer: C) Mantle
- What is the primary function of the siphon in cephalopods?
- A) Feeding
- B) Locomotion
- C) Respiration
- D) Reproduction
Answer: B) Locomotion
- Which of the following cephalopods has an external shell?
- A) Octopus
- B) Squid
- C) Nautilus
- D) Cuttlefish
Answer: C) Nautilus
- What is the main sensory organ in cephalopods?
- A) Tentacles
- B) Eyes
- C) Gills
- D) Mantle
Answer: B) Eyes
- How do cephalopods capture their prey?
- A) With their beak
- B) By using their tentacles
- C) With venom
- D) All of the above
Answer: D) All of the above
- Which cephalopod is known for its intelligence and problem-solving abilities?
- A) Cuttlefish
- B) Squid
- C) Octopus
- D) Nautilus
Answer: C) Octopus
- Cephalopods are capable of which of the following forms of locomotion?
- A) Jet propulsion
- B) Crawling
- C) Swimming
- D) All of the above
Answer: D) All of the above
- What is the primary method of reproduction in cephalopods?
- A) Asexual reproduction
- B) Sexual reproduction
- C) Budding
- D) Fragmentation
Answer: B) Sexual reproduction
- Which of the following structures do cephalopods lack compared to other mollusks?
- A) Shell
- B) Radula
- C) Mantle
- D) Tentacles
Answer: A) Shell
- What type of vision do cephalopods typically possess?
- A) Color vision
- B) Monochrome vision
- C) Night vision
- D) All of the above
Answer: A) Color vision
- The ability to squirt ink for defense is most commonly found in which group of cephalopods?
- A) Squids
- B) Cuttlefish
- C) Octopuses
- D) All of the above
Answer: D) All of the above
- Which cephalopod is known for having a unique internal shell called a pen?
- A) Octopus
- B) Nautilus
- C) Squid
- D) Cuttlefish
Answer: C) Squid
- Which of the following cephalopods can regenerate lost arms?
- A) Cuttlefish
- B) Squid
- C) Octopus
- D) Nautilus
Answer: C) Octopus
- The skin of cephalopods is unique because it contains:
- A) Feathers
- B) Chromatophores
- C) Scales
- D) Hair
Answer: B) Chromatophores
- Which of the following cephalopods is known for its ability to use tools?
- A) Nautilus
- B) Cuttlefish
- C) Octopus
- D) Squid
Answer: C) Octopus
- The hard beak of cephalopods is primarily used for:
- A) Digestion
- B) Defense
- C) Feeding
- D) Locomotion
Answer: C) Feeding
- What kind of habitat do most cephalopods prefer?
- A) Deep ocean
- B) Coral reefs
- C) Intertidal zones
- D) All of the above
Answer: D) All of the above
- Which cephalopod has the largest brain relative to body size of any invertebrate?
- A) Nautilus
- B) Squid
- C) Octopus
- D) Cuttlefish
Answer: C) Octopus
- What do cephalopods use to manipulate objects and capture prey?
- A) Siphon
- B) Tentacles
- C) Gills
- D) Mantle
Answer: B) Tentacles
- Which of the following features is unique to cephalopods compared to other mollusks?
- A) Presence of a shell
- B) Complex nervous system
- C) Mantle
- D) Radula
Answer: B) Complex nervous system
- What is the primary diet of most cephalopods?
- A) Algae
- B) Plankton
- C) Fish and crustaceans
- D) Detritus
Answer: C) Fish and crustaceans
- The term “cephalopod” translates to:
- A) Head-foot
- B) Soft-bodied
- C) Shellfish
- D) Tentacled creature
Answer: A) Head-foot