L1 What’s it all about

L1 What’s it all about - Whatsitallabout?

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What’s it all about? Try to understand broad patterns of evolution by  comparing the anatomy of different species ( why  things are like they are ). Functional anatomy – generally form and function  are linked both at the organism level and the  cellular level  ( but is there more than one way of  doing something And there is more than one use to which  something can be put ( feathers as insulators  became used for flying )
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Systems approach emphasises comparisons at several different  levels   anatomy   cell structure   gene organisation Different systems – integumentary, skeletal, muscular,  nervous, endocrine, digestive, respiratory, circulatory,  excretory, reproductive
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Cellular level  – specialised  in the same  way for  particular  functions Rbc – no nucleus  except camels  and Dalmatians
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Gene level - we have the  same patterning genes  as fish, amphioxus and  flies – Hox genes
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L1 What’s it all about - Whatsitallabout?

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