2025年4月2日 · A reptile is any member of the class Reptilia, the group of air-breathing vertebrates that have internal fertilization, amniotic development, and epidermal scales …

A reptile is an air-breathing animal that has scales instead of hair or feathers. Reptiles have lived on Earth for more than 280 million years. Scientists consider them to be the ancestors of birds …

reptile, Any of the approximately 8,700 species of the class Reptilia, the group of air-breathing vertebrates that have internal fertilization and a scaly body and are cold-blooded. Most species …

Encyclopædia Britannica, Inc. As the term vertebrate implies, reptiles have a backbone. The internal organs of reptiles are similar to those of birds and mammals. No reptile has gills; all …

2025年4月1日 · lizard, (suborder Sauria), any of more than 5,500 species of reptiles belonging in the order Squamata (which also includes snakes, suborder Serpentes). Lizards are scaly …

2025年4月2日 · Reptile - Circulation, Respiration, Adaptations: Modern reptiles do not have the capacity for the rapid sustained activity found in birds and mammals. With the evolution of …

2025年4月2日 · Reptile - Evolution, Paleontology, Adaptation: The first land vertebrates, the Tetrapoda, appeared near the middle of the Devonian Period. The earliest known reptiles, …

6 天之前 · snake, (suborderSerpentes), any of more than 3,400 species of reptiles distinguished by their limbless condition and greatly elongated body and tail. Classified with lizards in the …

A turtle is a reptile that has a shell covering its body. Turtles are known for moving very slowly. There are more than 350 species, or types, of turtle. Turtles are found in most parts of the …

2025年2月27日 · A tortoise is any member of the turtle family Testudinidae that is easily recognized by its unique hind-limb anatomy made up of elephantine (or cylindrical) hind limbs …