Which of the following statements is true about a frog's morphology?
Eyes enclosed by a nictitating membrane.
The hind limbs end in three digits
Frogs depict sexual dimorphism
Frogs contain neck
I and III
I and II
II and IV
III and IV
Statements I and III are true because a nictitating membrane present in a frog's eye is bulged and protects them in water. A membrane tympanum (ear) on either side of the eyes receives sound. There is sexual dimorphism in frogs.
Statements II and IV are untrue because a frog's body is made up of a head and a trunk; it lacks a tail and neck. The forelimbs contain four digits, and the hind limbs end in five digits.
Option 1 is the correct answer.