A) Mollusca B) Cephalopoda C) Pisces D) Arthropoda
A) Two B) Four C) Three D) One
A) Arctic Ocean B) Pacific Ocean C) Indian Ocean D) Atlantic Ocean
A) Carotene B) Chromatophores C) Hemoglobin D) Melanin
A) Six B) Twelve C) Eight D) Ten
A) Through skin B) Through gills C) Through lungs D) Through a snorkel-like tube
A) Blue ringed octopus B) Giant Pacific octopus C) Dumbo octopus D) Veined octopus
A) Blue ringed octopus B) Giant Pacific octopus C) Dumbo octopus D) Veined octopus
A) Mollusca B) Octopoda C) Cephalopodidae D) Arthropoda
A) Over 1000 species B) Some 300 species C) About 50 species D) Exactly 500 species
A) Spherically symmetric B) Radially symmetric C) Asymmetric D) Bilaterally symmetric
A) Their beak B) Their mantle C) Their tentacles D) The siphon
A) They migrate to a different habitat B) They become senescent and die C) They start caring for the eggs D) They continue to live for many years
A) It cures diseases B) It can make humans invisible C) It is deadly to humans D) It is harmless to humans
A) Pegasus B) Cerberus C) Medusa D) The kraken
A) Shunga erotic art B) Calligraphy C) Woodblock prints D) Pottery
A) Toilers of the Sea B) Les Misérables C) The Hunchback of Notre-Dame D) The Man Who Laughs
A) Flying away B) Expelling ink C) Singing loudly D) Building nests
A) Octopuses B) Octopi C) Octo D) Octopodes
A) Sound waves B) Electric shocks C) Camouflage and deceit D) Fireworks
A) The mantle B) A specially-adapted arm C) The siphon D) The beak
A) They migrate to a new habitat B) They care for the eggs until they hatch and then die C) They abandon the eggs D) They eat the eggs
A) Their beak B) Their siphon C) Their eyes D) Their tentacles
A) 10–50 kg (22–110 lb) B) 5–20 kg (11–44 lb) C) 30–60 kg (66–132 lb) D) 70–100 kg (154–220 lb)
A) Arm B) Head C) Mantle D) Funnel
A) Four pairs B) Two pairs C) Eight pairs D) Six pairs
A) Cartilaginous capsules B) Suckers on the arms C) Cells in the fibrous dermis D) Muscles in the mantle
A) Nerve impulses from the brain B) Chemical secretions C) Pressure changes in the mantle D) Muscle contractions in the suckers
A) Octopus wolfi B) Cirrina C) Giant Pacific octopus D) Haliphron atlanticus
A) Produces light B) Detects sound waves C) Changes color for camouflage D) Screens incident light in bright conditions
A) Collagen B) Cartilage C) Silica D) Bone
A) Semi-closed B) Closed C) None D) Open
A) Haemocyanin B) Cytochrome c C) Myoglobin D) Hemoglobin
A) Green B) Bluish C) Red D) Yellow
A) Kröger et al., 2011 B) Fuchs et al., 2019 C) Sanchez et al., 2018 D) Ibáñez et al., 2020
A) Italy B) France C) United States D) Germany
A) Decapods B) Pterygota C) Cirrates D) Incirrates
A) Vulcanoctopus hydrothermalis B) Spoon-armed octopus C) Common octopus D) Hawaiian day octopus
A) Coral reefs B) Hydrothermal vents C) Seagrass beds D) Fresh water
A) Aristotle B) Japetus Steenstrup C) Georges Cuvier D) Heinrich Müller
A) Classical conditioning B) Social learning C) Operant conditioning D) Observational learning
A) Fungus Vibrio lentus B) Gram-negative bacterium Vibrio lentus C) Protozoan Vibrio lentus D) Gram-positive bacterium Vibrio lentus
A) Blue-ringed octopuses B) Common octopuses C) Cirrate octopuses D) Giant Pacific octopuses
A) RNA polymerase enzymes B) Helicase enzymes C) DNA ligase enzymes D) ADAR enzymes
A) Hemoglobin B) Carotene C) Chlorophyll D) Melanin
A) Cirrina B) Vibrio C) Dicyemidae D) Aggregata
A) Vulcanoctopus hydrothermalis B) Spoon-armed octopus C) Argonauts D) Common octopus
A) Around 41% B) 65% C) 33% D) 3%
A) Maya Civilization B) Ancient Egypt C) Roman Empire D) Minoan civilization
A) Senescence B) Juvenile stage C) Maturity D) Reproduction
A) Three B) Two C) Four D) One
A) Nihon Shoki B) Kojiki C) Taishokan D) Genji Monogatari
A) Circular muscles B) Radial muscles C) Branchial hearts D) Flapper valves
A) Chitin B) Protein C) Calcium carbonate D) Silica
A) Twenty Thousand Leagues Under the Sea B) Jaws C) Moby Dick D) Gravity's Rainbow (1973)
A) Fluid B) Ammonia C) Blood D) Urine
A) Changing texture of the skin B) Camouflage to blend into surroundings C) Conspicuous warning coloration D) Ejecting ink as a defense mechanism
A) Tentacles B) Funnel C) Beak D) Hectocotylus
A) Enteroctopus dofleini. B) Octopus vulgaris. C) Sepia officinalis. D) Grimpoteuthis.
A) The muscular skin folds contract, revealing the iridescent warning B) They disappear completely C) They expand and become more visible D) They change color to blend in with surroundings
A) The embryo splits into two B) The mantle develops C) The shell gland forms D) The germinal disc surrounds the yolk, forming a yolk sac
A) Emitting bioluminescent light B) Mimicking other, more dangerous animals C) Changing color to blend with sand D) Building complex shelters
A) The caecum B) The buccal mass C) The stomach D) The crop
A) Seven months B) One month C) Two months D) Five months (160 days)
A) Only if connected to the brain B) No C) Yes D) Only if connected to the mantle cavity
A) Square B) Round C) U, W, or dumbbell-shaped D) Triangular
A) Is negligible compared to resting energy use B) Nearly matches the energy used at rest C) Is higher than all other activities combined D) Is lower than the energy used at rest
A) 50% B) 66% C) 40% D) 80%
A) Muscle fibers B) Bony frameworks C) Cartilage supports D) Extensive connective tissue lattices
A) Strychnine B) Tetrodotoxin C) Curare D) Cyanide
A) Cornucopia-shaped B) Spherical C) Cylindrical D) Flat disc
A) Gregor Mendel B) William Elford Leach C) Carl Linnaeus D) Charles Darwin
A) Yes, like many other animals B) No C) Yes, but only in their brains D) Only during mating displays
A) Warmer tropical waters B) Colder waters, such as those off Alaska C) Temperate coastal waters D) Shallow estuarine waters
A) It uses more oxygen. B) Its blood pressure drops. C) The systemic heart becomes inactive. D) It has no gill hearts.
A) Two B) Four C) One D) Eight
A) Italy B) United Kingdom C) France D) Germany
A) Ejecting ink as a defense mechanism B) Bluffing a threatening appearance C) Camouflaging into the environment D) Changing color to communicate
A) Lack of food B) The optic glands C) Predator presence D) Temperature changes
A) Hawaiian day octopus B) Abdopus aculeatus C) Vulcanoctopus hydrothermalis D) Spoon-armed octopus
A) The intestine B) The caecum C) The stomach D) The crop
A) Aggregata B) Cephalopoda C) Dicyemidae D) Vibrio
A) Coral reefs B) Pelagic waters C) Deep ocean trenches D) Shallow tide pools
A) Hooking B) Trawling C) Pots D) Trapping
A) Attached to the optic gland B) In the mantle cavity C) Under the digestive gland D) Near the beak |