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