Question

the study of both reptiles and amphibians is known as herpetology, and scientists who specialize in this are called herpetologists. herpetologists are trained to identify the unique characteristics of these creatures. dry, scaly skin and clawed feet are two common reptilian features. reptiles use lungs to breathe, and they are cold-blooded, which means that their body temperatures depend on conditions in their environments. amphibians are also cold-blooded, but they lack clawed feet. amphibians require wet environments to keep their smooth skin moist, and they may use either lungs or gills to breathe. one interesting defensive trait observed in both reptiles and amphibians is autotomy, or the ability to lose a body part (often a tail) in order to distract predators.

Explanation:

• Studied by herpetologists: The text states "The study of both reptiles and amphibians is known as herpetology", so both should be checked.
• Have dry and scaly skin: "Dry, scaly skin... common reptilian features", so only reptiles.
• May have clawed feet: "Dry, scaly skin and clawed feet are two common reptilian features. Amphibians... lack clawed feet", so only reptiles.
• Are cold - blooded: "Reptiles... are cold - blooded. Amphibians are also cold - blooded", so both.
• Can use gills or lungs to breathe: "Amphibians... may use either lungs or gills to breathe", so only amphibians.

Answer:

• Studied by herpetologists: Amphibians (✔), Reptiles (✔)
• Have dry and scaly skin: Amphibians (✖), Reptiles (✔)
• May have clawed feet: Amphibians (✖), Reptiles (✔)
• Are cold - blooded: Amphibians (✔), Reptiles (✔)
• Can use gills or lungs to breathe: Amphibians (✔), Reptiles (✖)