A) Seashell B) Seahorse C) Seal D) Starfish
A) 10 B) 5 C) 8 D) 6
A) Claws B) Fins C) Tube feet D) Tentacles
A) Pollution B) Climate change C) Sea star wasting disease D) Overfishing
A) Circulatory system B) Water vascular system C) Digestive system D) Nervous system
A) Pacific B) Atlantic C) Indian D) Arctic
A) Asymmetry B) Spiral symmetry C) Radial symmetry D) Bilateral symmetry
A) Algae B) Fish C) Plants D) Mollusks
A) Holothuroidea B) Asteroidea C) Ophiuroidea D) Echinoidea
A) Freshwater lakes B) Intertidal zones C) Abyssal depths D) Tropical oceans
A) Yellow B) Green C) Red or orange D) Black
A) Invasive species B) Keystone species C) Predator on fish D) Coral polyp
A) Releasing ink B) Shedding arms C) Camouflage D) Electric shock
A) Cambrian period around 500 million years ago B) Ordovician period around 450 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) Soft tissues D) Ossicles and spines
A) It lacks tube feet. B) It has no central disc. C) It can have more than fifty arms. D) It is entirely transparent.
A) Detritus feeding B) Specialized feeding C) Herbivorous feeding D) Filter feeding
A) By binary fission B) Only asexually C) Both sexually and asexually D) Only sexually
A) Fish eggs B) Seaweed C) Benthic invertebrates D) Plankton
A) A thin cuticle B) Collagen fibres C) A thick dermis D) Papulae
A) Epidermis B) Peritoneum C) Dermis D) Myoepithelial layer
A) Within papulae B) On the outer surface only C) Under the epidermal layer, even those emerging externally D) In the coelomic cavity
A) Single layer of cells B) Thin cuticle C) Collagen fibres D) Calcium carbonate components known as calcite microcrystals arranged in a lattice
A) Support collagen fibres B) Protect madreporite C) Serve a respiratory function D) Displace organisms from surface
A) Calcium carbonate B) Collagen fibres C) Chitin D) Silica
A) Plasmodium falciparum B) Orchitophrya stellarum C) Trypanosoma brucei D) Giardia lamblia
A) Marthasterias glacialis B) Pisaster ochraceus C) Asterina pectinifera D) Protoreaster nodosus
A) colchicine B) cycloheximide C) 1-methyladenine D) 2-deoxyglucose
A) 23 °C (73 °F) B) 25 °C (77 °F) C) 30 °C (86 °F) D) 35 °C (95 °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) Stores undigested food D) Absorbs nutrients directly from water
A) Echinoidea B) Asterozoa C) Somasteroidea D) Crinoidea
A) Spinulosida B) Forcipulatida C) Brisingida D) Valvatida
A) Lagerstätten B) Strata C) Fossil beds D) Sediment layers
A) Radial canal B) Madreporite C) Stone canal D) Ampulla
A) Ectodermic layer. B) Catch connective tissue. C) Water vascular system. D) Gut tissue.
A) Via the anus B) Into the stomach C) To the tips of the papulae D) Through the mouth
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) They secrete adhesive chemicals for tube feet attachment. D) Cilia are responsible for producing oxygen in the starfish.
A) Astropecten polyacanthus B) Calliasterellidae C) Trichasteropsida D) Palasteriscus
A) A tough peristomial membrane B) An exoskeleton C) Mucus glands D) Spines
A) Open oceans B) Estuarine environments C) Coral reefs D) Deep oceanic trenches
A) Forcipulatida B) Paxillosida C) Velatida D) Brisingida
A) 100 g (3.5 oz) B) 20 g (0.7 oz) C) 70–90 g (2.5–3.2 oz) D) 50 g (1.8 oz)
A) Comet form B) Brachiolaria C) Juvenile starfish D) Bipinnaria
A) Asterozoa B) Echinoidea C) Crinoidea D) Holothuroidea
A) A few days. B) Several months. C) One week. D) Instantly after the loss of an arm.
A) Latin B) French C) Greek D) English
A) Linckia laevigata B) Asterina pectinifera C) Oreaster reticulatus D) Marthasterias glacialis
A) Velatida B) Brisingida C) Paxillosida D) Concentricycloidea
A) Phagocytic coelomocytes B) Muscle cells C) Epithelial cells D) Nerve cells
A) Paxillosida B) Valvatida C) Forcipulatida D) Spinulosida
A) Brisingida B) Paxillosida C) Notomyotida D) Forcipulatida
A) Oreaster reticulatus B) Crown-of-thorns starfish C) Pisaster ochraceus D) Asterias amurensis
A) Asterina gibbosa B) Pteraster militaris C) Nepanthia belcheri D) Parvulastra parvivipara
A) Brisingida B) Forcipulatida C) Notomyotida D) Velatida
A) Pisaster ochraceus B) Patiria miniata C) Asterias rubens 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) 1000–1500 B) 300–500 C) 10–50 D) 80–200
A) Calliasterella B) Astropecten polyacanthus C) Trichasteropsis D) Palasteriscus
A) Crinoidea B) Brisingida C) Echinoidea D) Holothuroidea
A) Paxillosida B) Valvatida C) Spinulosida D) Brisingida
A) Parvulastra parvivipara B) Asterina gibbosa C) Nepanthia belcheri D) Pteraster militaris |