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Q: Which of the following is true?
  • A. Amphibians have a 3–chambered heart with two atria and a single ventricle
  • B. Fishes have a 3–chambered heart with two atria and a single ventricle
  • C. Amphibians have a 3–chambered heart with a single atria and two ventricles
  • D. Fishes have a 3–chambered heart with single atria and two ventricles
Correct Answer: Option A - Amphibians are ectothermic, tetrapod vertebrates of the class Amphibia. They inhabit a wide variety of habitats with most species living within terrestrial, fossorial, arboreal or fresh water aquatic ecosystem, amphibians start out as larvae living in water. The young generally undergo metamorphosis from larva with gills to an adult air-breathing form with lungs. Amphibians have a 3-chambered heart with two atria and a single ventricle.
A. Amphibians are ectothermic, tetrapod vertebrates of the class Amphibia. They inhabit a wide variety of habitats with most species living within terrestrial, fossorial, arboreal or fresh water aquatic ecosystem, amphibians start out as larvae living in water. The young generally undergo metamorphosis from larva with gills to an adult air-breathing form with lungs. Amphibians have a 3-chambered heart with two atria and a single ventricle.

Explanations:

Amphibians are ectothermic, tetrapod vertebrates of the class Amphibia. They inhabit a wide variety of habitats with most species living within terrestrial, fossorial, arboreal or fresh water aquatic ecosystem, amphibians start out as larvae living in water. The young generally undergo metamorphosis from larva with gills to an adult air-breathing form with lungs. Amphibians have a 3-chambered heart with two atria and a single ventricle.