Which of these characteristics is NOT found in the amphibians?

What are your choices?

To determine which characteristic is NOT found in amphibians, we need to identify the key features that are typically associated with amphibians.

Amphibians are a class of vertebrates that include frogs, toads, salamanders, and caecilians. They are known for their ability to live both in water and on land. Here are some key characteristics of amphibians:

1. Moist, scaleless skin: Amphibians have thin, moist skin that allows them to respire through their skin. This is important for their ability to breathe in water and on land.

2. Metamorphosis: Most amphibians undergo metamorphosis, where they transition through distinct life stages. For example, frog eggs hatch into aquatic tadpoles, which then metamorphose into adult frogs with lungs.

3. Double-loop circulatory system: Amphibians have a double-loop circulatory system, which means that their blood passes through the heart twice during each complete circuit of the body.

4. Ectothermic: Amphibians are ectothermic or cold-blooded, meaning their body temperature is dependent on the temperature of their surroundings.

Based on these characteristics, the one characteristic that is NOT found in amphibians is the presence of scales. Unlike reptiles, amphibians do not have scales covering their skin.

Therefore, the characteristic "scales" is NOT found in amphibians.