Lesson 5 - Similarities in Mammals
Aim: To explore the similarities in mammalian skeleton structures, the arms in particular.
The following animals are all classified as mammals. We all share similar characteristics that place us in the same group, although we’re related closer to the Primate Family.
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After looking at and discussing the above mammals, and why they are mammals, have a think about specific adaptations for each species. They may look different, but they are more like us then many realize.
The giraffe, while it has a longer neck, has the exact same amount of neck vertebrae as a human.
The bat is the only true mammal that can fly (the rest glide, birds are not mammals), and it has the same amount of forearm bones as a human.
The whale has vestigial hip/leg bones (vestigial means its shrunk due to lack of use), as it once was a land animal.
Discuss what other advantageous adaption’s these animals may have, while still being mammals.
The similarities in Mammal forearm bones is nothing short of astonishing. In the examples provided here, it shows how we share the same amount of forearm bones, but they can have a diverse range of functions. Discuss as a class the need which these animals have, to be as efficient in their habitats as possible, in order to survive.
Reflections Questions
1. How would these physical changes help the mammal group?
2. How have these changes occurred?
3. Why have these changes occurred?
4. Which animal group do you think has the most number of different species eg: reptiles, mammals, invertebrates? Why?