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