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