1. Amphibia
2. Frogs belong to the class Amphibia because they are cold-blooded vertebrates that typically have a larval stage (tadpole) living in water and an adult stage that can live on land, possessing moist skin and lacking scales.
3. Amphibians are considered a unique evolutionary group because they represent the first tetrapods to transition from aquatic to terrestrial life, bridging the gap between fish and reptiles, and exhibit a dual-life cycle dependent on both water and land environments.
4.
a. Dorsal side - Top surface of the frog.
b. Ventral side - Bottom surface of the frog.
c. Anterior end (Cranial) - Head end of the frog.
d. Posterior end (Caudal) - Tail end (rear) of the frog.
e. Medial - Toward the midline of the frog’s body.
f. Lateral - Away from the midline, toward the sides of the frog’s body.
Parent Tip: Review the logic above to help your child master the concept of frog dissection worksheet answers.
