Examlex
Which choice is an example of an amorphous solid?
Horny Beak
A hard, keratinous structure found in birds and certain reptiles, used for feeding, grooming, and other behaviors.
Respiratory Air Sacs
Membrane-enclosed spaces in birds that are part of the respiratory system, aiding in oxygen exchange and making flight more efficient.
Three-chambered Heart
A type of heart structure found in amphibians and some reptiles, consisting of two atria and one ventricle.
Amphibians
A class of cold-blooded vertebrates that includes frogs, toads, salamanders, and newts, which typically have a life cycle that includes both aquatic (larval) and terrestrial (adult) stages.
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