20. Single circulation, i.e., blood flows through the heart only once during one cycle of passage through the body, exhibited by (a)Labeo, Chameleon, Salamander (b)Hippocampus, Exocoetus, Anabas (c) Hyla, Rana, Draco (d) whale, dolphin, turtle
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Answer:
a labeo chameleon salamander
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ANSWER:
Single circulation occurs in Hippocampus, Exocoetus, anabas.
EXPLANATION:
Hippocampus, exocoetus anabas are the type of fishes. They have two chambered heart. The blood close through single circulation. They have one atrium and one ventricle circulation.
Anabas variety are found in asia. They can be large upto 1 feet. Exocoetus is also known as flying fish. They are also native of asia. Hippocampus fish also known as sea horse. They are in about 45 varieties.
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