Question

Why do we keep both, snake and turtle in the same class?

Answer 1

Hint:Both snake and turtle belongs to class reptilian. They possess common features. The class name refers to their creeping or crawling made of locomotion. They are mostly terrestrial.

Complete answer:
Both snake and turtles are kept in the same class as they share common:
Features:
(i) Snake and turtles both have scales or scales on their body.
(ii) Both have three chambered hearts.
(iii) They both are poikilotherms i.e. are cold-blood organisms as they lack capacity to regulate their body temperature.
(iv) Both breath by lungs.
(v) They lay eggs with thick covering, they are oviparous.
(vi) In both embryos is protected by extra embryonic membranes.

Additional Information:
Snake: The skin of snakes is made up of scales that may be smooth or ridged. Scales or scutes on the belly are thicker than those on the sides and back of a snake. They provide protection as it moves. They have no limbs, no moveable eyelids and no ear openings.
Turtles: They are made up of a large number of bones that are covered by large scales. Some turtles can tuck their head, legs and tail inside their shell. The shell is permanently attached at the spine and rib cage.

Note:Other organisms belonging to class reptilia are: Tortoise, Chameleon, Crocodile, Wall lizard etc.Reptiles have three chambered hearts, but crocodile is exceptional with four chambered heart.