Question

An animal was identified as a poikilothermic, aquatic and oviparous reptile. Which another character should have been checked before assigning it as a reptile?

• A. Type of limbs
• B. Structure of head
• C. Presence of tail
• D. Exoskeleton of epidermal scales

Answer 1

The correct option is D Exoskeleton of epidermal scales

Reptiles are the class of Reptilia, which includes turtles, crocodiles, snakes, lizards etc.
Poikilothermic animals are those which have the inability to regulate the core body temperature (as by sweating to cool off or by putting on clothes to warm up). These include fishes, reptiles.
Reptiles are tetrapods, creatures that either has four limbs or like snakes, being descended from four-limbed ancestors. They don't have the aquatic larval stage. Most reptiles are oviparous.
Another important feature of reptiles is that the reptilian skin is covered in a horny epidermis, making its water-tight and enabling reptiles live on dry land. The exposed parts of the reptiles are protected by scales or scutes.

So, the correct answer is option D.