Classification Of Animals
Chapter Name : Animal Kingdom |
Sub Topic Code : 103_11_04_02_15 |
Topic Name : Classification Of Animals |
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Sub Topic Name : Class-Reptilia |
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Introduction
Reptiles are called so because of their creeping/crawling mode of locomotion. Reptiles are mostly terrestrial with some exceptions like sea turtles etc.
Pre-Requisites:
Class amphibia and its unique features. The basis on which chordates are divided into various classes.
Activity:
Observe some reptiles like crocodiles, snakes, lizards.
Real Life Question:
If some reptiles can live under water, why are they not called amphibians?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Scales | Small rigid plate that grows out of an animal's skin (epidermal) to provide protection. |
| Scutes | These are similar to scales, serve the same function, but are formed in the lower vascular layer of the skin and not epidermis |
| Poikilotherms | Organisms who cannot maintain their body temperature. |
| Tympanum | A hearing organ present on both sides of the head instead of the ear. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Observe a small reptile under the light microscope. | Try to point out if scales are present or scutes. |
Places to visit :
Biology Laboratory, aquarium, museum, zoo.
Practical examples around us
| Examples | Explainations |
|---|---|
| Reptiles | Reptiles generally have 2 pairs of limbs but there exist limbless reptiles also like snakes. |
What you learn in Theory:
The various distinguishing features of class reptilia like the presence of scales/scutes etc.
What you learn in Practice:
Some reptiles have evolved to live in aquatic habitats too but that doesn’t mean they are amphibians.