A) Seal B) Seahorse C) Seashell D) Starfish
A) 10 B) 6 C) 5 D) 8
A) Claws B) Fins C) Tube feet D) Tentacles
A) Overfishing B) Sea star wasting disease C) Climate change D) Pollution
A) Circulatory system B) Digestive system C) Nervous system D) Water vascular system
A) Pacific B) Atlantic C) Arctic D) Indian
A) Spiral symmetry B) Bilateral symmetry C) Asymmetry D) Radial symmetry
A) Mollusks B) Algae C) Fish D) Plants
A) Ophiuroidea B) Holothuroidea C) Echinoidea D) Asteroidea
A) Intertidal zones B) Tropical oceans C) Freshwater lakes D) Abyssal depths
A) Red or orange B) Black C) Yellow D) Green
A) Predator on fish B) Coral polyp C) Invasive species D) Keystone species
A) Electric shock B) Camouflage C) Releasing ink D) Shedding arms
A) Ordovician period around 450 million years ago B) Cambrian period around 500 million years ago C) Cretaceous period around 100 million years ago D) Jurassic period around 200 million years ago
A) Entire body B) Tube feet C) Ossicles and spines D) Soft tissues
A) It lacks tube feet. B) It can have more than fifty arms. C) It has no central disc. D) It is entirely transparent.
A) Filter feeding B) Detritus feeding C) Herbivorous feeding D) Specialized feeding
A) Only asexually B) Both sexually and asexually C) Only sexually D) By binary fission
A) Plankton B) Seaweed C) Benthic invertebrates D) Fish eggs
A) Collagen fibres B) A thin cuticle C) A thick dermis D) Papulae
A) Peritoneum B) Epidermis C) Dermis D) Myoepithelial layer
A) Under the epidermal layer, even those emerging externally B) Within papulae C) In the coelomic cavity D) On the outer surface only
A) Single layer of cells B) Calcium carbonate components known as calcite microcrystals arranged in a lattice C) Collagen fibres D) Thin cuticle
A) Serve a respiratory function B) Support collagen fibres C) Displace organisms from surface D) Protect madreporite
A) Collagen fibres B) Calcium carbonate C) Chitin D) Silica
A) Plasmodium falciparum B) Trypanosoma brucei C) Giardia lamblia D) Orchitophrya stellarum
A) Marthasterias glacialis B) Protoreaster nodosus C) Asterina pectinifera D) Pisaster ochraceus
A) cycloheximide B) 2-deoxyglucose C) 1-methyladenine D) colchicine
A) 35 °C (95 °F) B) 23 °C (73 °F) C) 30 °C (86 °F) D) 25 °C (77 °F)
A) Once every hour B) Thirty times a minute C) Continuously without pause D) About six times a minute
A) Filters waste products B) Starts digestion by swallowing prey whole C) Absorbs nutrients directly from water D) Stores undigested food
A) Somasteroidea B) Echinoidea C) Crinoidea D) Asterozoa
A) Spinulosida B) Brisingida C) Valvatida D) Forcipulatida
A) Lagerstätten B) Fossil beds C) Sediment layers D) Strata
A) Radial canal B) Ampulla C) Madreporite D) Stone canal
A) Gut tissue. B) Ectodermic layer. C) Water vascular system. D) Catch connective tissue.
A) Through the mouth B) Via the anus C) To the tips of the papulae D) Into the stomach
A) Lactic acid B) Carbon dioxide C) Urates D) Sulfates
A) They initiate fluid movement, which is bidirectional. B) Cilia provide structural support to the canals. C) Cilia are responsible for producing oxygen in the starfish. D) They secrete adhesive chemicals for tube feet attachment.
A) Astropecten polyacanthus B) Trichasteropsida C) Calliasterellidae D) Palasteriscus
A) Mucus glands B) An exoskeleton C) Spines D) A tough peristomial membrane
A) Coral reefs B) Open oceans C) Deep oceanic trenches D) Estuarine environments
A) Forcipulatida B) Paxillosida C) Brisingida D) Velatida
A) 50 g (1.8 oz) B) 100 g (3.5 oz) C) 70–90 g (2.5–3.2 oz) D) 20 g (0.7 oz)
A) Bipinnaria B) Juvenile starfish C) Comet form D) Brachiolaria
A) Asterozoa B) Echinoidea C) Crinoidea D) Holothuroidea
A) One week. B) Several months. C) Instantly after the loss of an arm. D) A few days.
A) French B) Greek C) English D) Latin
A) Marthasterias glacialis B) Oreaster reticulatus C) Linckia laevigata D) Asterina pectinifera
A) Concentricycloidea B) Velatida C) Paxillosida D) Brisingida
A) Epithelial cells B) Muscle cells C) Phagocytic coelomocytes D) Nerve cells
A) Forcipulatida B) Valvatida C) Spinulosida D) Paxillosida
A) Brisingida B) Paxillosida C) Forcipulatida D) Notomyotida
A) Crown-of-thorns starfish B) Oreaster reticulatus C) Asterias amurensis D) Pisaster ochraceus
A) Parvulastra parvivipara B) Asterina gibbosa C) Nepanthia belcheri D) Pteraster militaris
A) Brisingida B) Forcipulatida C) Notomyotida D) Velatida
A) Pisaster ochraceus B) Asterias rubens C) Astropecten polyacanthus D) Patiria miniata
A) Near the base of the tube feet B) In one of the arms C) At the center of the oral surface D) On the aboral surface
A) 10–50 B) 1000–1500 C) 300–500 D) 80–200
A) Calliasterella B) Astropecten polyacanthus C) Trichasteropsis D) Palasteriscus
A) Holothuroidea B) Echinoidea C) Brisingida D) Crinoidea
A) Valvatida B) Brisingida C) Paxillosida D) Spinulosida
A) Nepanthia belcheri B) Asterina gibbosa C) Pteraster militaris D) Parvulastra parvivipara |