Question

Write about class "Reptilia". Mention their body structure, general characters

Are their eggs Megalecithal?

Answer 1

Reptilia:

• They are the first successful terrestrial animal

• The class refers to creeping or crawling mode of locomotion

• They are cold blooded animals

• They are mostly terrestrial but some are aquatic

• Development is direct

• Their body is dry and has conified skin, epidermal scales

• Skin is non glandular

• Teeths are homodont, polyphyodont and mostly pleurodont

• Skull is monocondylic

• One pair of metanephric kidnys are present

• There are 12 pairs of cranial nerves present in them

• Eggs are Megalecithal which means they have a large amount of yolk

Eg:- Snakes, Lizards etc

Answer 2

Class reptilia is subclassified based on the following characteristics: The class name refers to their creeping or crawling mode of locomotion (Latin, repere or reptum, to creep or crawl). They are mostly terrestrial animals and their body is covered by dry and cornified skin, epidermal scales or scutes.