1. Dual Life Cycle: One of the most distinguishing features of amphibians is their dual life cycle. They spend their early life in water, where they breathe through gills and have a tail for swimming, much like fish. As they mature, they undergo a process called metamorphosis, where they develop lungs for breathing air and legs for moving on land. This ability to live both in water and on land is unique to amphibians among vertebrates.

2. Skin Type: Another distinguishing feature of amphibians is their skin. Unlike other vertebrates, amphibians have a thin, moist skin that lacks scales, feathers, or hair. This skin is permeable, allowing them to absorb water and oxygen directly from their environment. This is why amphibians are often found in damp or humid habitats.

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1. Dual Life Cycle: One of the most distinguishing features of amphibians is their dual life cycle. They spend their early life in water, where they breathe through gills and have a tail for swimming, much like fish. As they mature, they undergo a process called metamorphosis, where they develop lungs for breathing air and legs for moving on land. This ability to live both in water and on land is unique to amphibians among vertebrates.

2. Skin Type: Another distinguishing feature of amphibians is their skin. Unlike other vertebrates, amphibians have a thin, moist skin that lacks scales, feathers, or hair. This skin is permeable, allowing them to absorb water and oxygen directly from their environment. This is why amphibians are often found in damp or humid habitats.

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1. Dual Life Cycle: One of the most distinguishing features of amphibians is their dual life cycle. They spend their early life in water, where they breathe through gills and have a tail for swimming, much like fish. As they mature, they undergo a process called metamorphosis, where they develop lungs for breathing air and legs for moving on land. This ability to live both in water and on land is unique to amphibians among vertebrates.

2. Skin Type: Another distinguishing feature of amphibians is their skin. Unlike other vertebrates, amphibians have a thin, moist skin that lacks scales, feathers, or hair. This skin is permeable, allowing them to absorb water and oxygen directly from their environment. This is why amphibians are often found in damp or humid habitats.

Frogs are classified as amphibians.State two features of amphibians that distinguish them from all other vertebrates

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