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Unit Three: Diversity and Adaptation in Living Organisms

Fifth: Classifying mammals according to the type and number of teeth. Activity

4 (Identifying the teeth type and number in some mammals)

Examina the skull of a cat, rat and a rabbit. Realize the shape, type and Rat skull Cat skull Rabbit skull number of teeth in each of them. • Record your observations: ................................................................................. • Conclusion: Mammals are classified according to the existence of teeth into: A. Edentats (Teethless mammals): Such as the sloth and armadillo.

Sloth

Armadillo

B. Mammals having teeth: According to the shape and type, these mammals are divided into: 1. Animals have front teeth extending outwards such as hedgehog to capture the insects. 2. Animals have pointed canines and molars with Hedgehog sharp projections such as the lion and tiger. Tiger

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First Grade Preparatory

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