Question

Which of the animals possess a split tongue ?
A. Lion
B. Dog
C. Frog
D. Snake

Answer 1

Hint: Animals belonging to Phylum chordata are fundamentally characterized by the presence of a notochord. Phylum chordata divided into three subphyla Urochordata, cephalochordata and vertebrata. Vertebrates have a super class in which tetrapoda that means bear limbs have Animal class such as Amphibia, Reptilia, Aves and Mammals are present. And the second is pisces that means bear fins. Which include class Chondrichthyes and Osteichthyes.

Complete Answer:
- Reptilia is the class of animals which is named according to their creeping or crawling mode of locomotion.
- They are mostly terrestrial animals and their bodies are covered by dry and cornified skin, epidermal scales or scutes.
- Reptiles do not have external ear openings. Tympanum represents their ear. They also have a split tongue. It helps the Reptiles ( snake ) to smell and also pick the direction of smell to get to the source of smell.
- Limbs when present are two pairs. Heart is usually three chambered. Reptiles are poikilothermic Animals that mean they cannot maintain their body temperature internally.
Snakes and lizards shed their scales or skin cast. Sexes are separate. Fertilization is internal. They are oviparous and development is direct.
- Some examples are snakes, turtles, tortoises and tree lizards etc.

So the correct answer is (D).

Note: The heart of a reptile has three chambers that means incomplete double circulation is present. But for an exception the heart of a crocodile is four chambered which also belongs to reptiles and has complete double circulation. Heart of birds and mammals is also complete with double circulation and four chambers.