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Echinoderm: Quiz


Question 1: The colours are produced by a variable combination of coloured pigments, such as the dark melanin, red carotinoids, and ________ proteins, which can be blue, green, or violet.

Question 2: The phylum contains about 7,000 living species, making it the second-largest grouping of ________, after the chordates; they are also the largest phylum that has no freshwater or terrestrial representatives.

Question 3: It can generally be divided into a pharynx, ________, intestine and anus or cloaca.
Vermiform appendixStomachSmall intestineColon (anatomy)

Question 4: Echinoderms (Phylum Echinodermata) are a phylum of marine ________.

Question 5: They have a simple radial nervous system that consists of a modified nerve net — interconnected neurons with no central ________ (although some do possess ganglia).
Sensory systemBrainEndocrine systemDigestion

Question 6: Around 50,000 tons of sea urchins are captured each year, the gonads of which are consumed particularly in Japan, Peru, and in ________.
CanadaUnited KingdomFranceItaly

Question 7: Echinoderms lack specialized excretory organs and so nitrogenous waste, chiefly in the form of ________ diffuses out through the respiratory surfaces.

Question 8: The first universally accepted echinoderms appear in the ________ period (Paul and Smith 1984).
Cambrian explosionCambrianDevonianGeologic time scale

Question 9: The Echinoid Directory from the ________.
Victoria and Albert MuseumBritish MuseumNatural History MuseumImperial War Museum

Question 10: An ancestor that became free-moving might have given rise to Asteroidea, Ophiuroidia, Holothuroidea, and ________.
SquidHerringSturgeonSea urchin


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