Question : Which group of animals are named because of their spiny skin and a peculiar water-driven tube system that they use for moving around?
Option 1: Hemichordata
Option 2: Aschelminthes
Option 3: Echinodermata
Option 4: Mollusca
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Correct Answer: Echinodermata
Solution : The correct answer is Echinodermata.
Echinoderms are invertebrates with spiny skin, a water circulatory system, and a primitive nervous system. They have a distinct water circulatory system that includes tube feet that enable slow but strong movement. Water circulates via the water vascular system of an echinoderm, which is composed of a central ring of canals that spreads along each arm for gaseous exchange and nourishment.
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Question : The body of the ______ is circular in cross-section; hence, the name roundworms. They may be free-living, aquatic, terrestrial, or parasitic on plants and animals.
Question : Diamonds are priced higher than water because :
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Question : Which of the following is correct about cold blooded animals?
Question : Which of the following animals have a single opening in their digestive system that serves both as a mouth and an anus?
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