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- The fossil record shows similarities in bone structure of Pinnipeds. Similar bone structures can be a useful tool to link pinnipeds to their ancestors.

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Exemplary Organisms:
- Leopard Seal
- Galápagos Sea Lion
- Walrus

The exemplary organisms of this taxonomy group are all very different form each othe

The Leopard Seal is part of the "True Seal" family. It has smaller flippers built to be more agile in water.

The Galápagos Sea Lion is part of the "Eared Seal" family. It has flippers it can turn so it can move around faster on land.

The Walrus has it's own separate family of alive Pinnipeds. It is on land a lot and has tusks.

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Characteristics:
- Carnivores
- Back Bone
- Flippers

Pinnipeds are Carnivores in nature, meaning they eat other animals for food. The back bone in Pinnipeds extends along their back to support their body structure and help them move around stably. Their flippers actually allow them to move around. Some flippers are built better for land, and others for sea.

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- The three Karyotypes for three Pinnipeds in different families show evolution. The chromosomes look fairly similar to each other in structure with similar numbers of HSA and CFA.

- 3, 3, 3
- 4, None, 4
- 7, 8, None
- 9, 9, 8
- 13, 12, 11
- 15, 17, 15

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- Pinnipeds over time have been changing. They have evolved by going in different directions evolution wise. They gradually become different, so it seems as if they gradually change.

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- Pinnipeds seem to be following a divergent evolution pattern. Geographic isolation has been a large contributing factor to the evolution isolating Pinnipeds and having them adapt differently.

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http://www.palaeontologyonline.com/articles/2015/fossil-focus-seals-sea-lions-walruses/?doing_wp_cron=1493126922.8779180049896240234375

http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0147647

http://placentation.ucsd.edu/seal.htm

https://en.wikipedia.org/wiki/Pinniped