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