How can evolution refine existing adaptions?

a complex structure may evolved from a simpler structure having same basic function

How was chitin modified to serve a additional function?

forms the exoskeleton of arthropods, help the challenge of dehydration

How were flippers of penguins modified for a new function?

the "flipper-wings" enable the penguin to "fly" through the water

the study of the processes of multicellular organisms as they develop from fertilized eggs to fully formed organisms

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Evolution is usually a remolding process

Question	Answer
How can evolution refine existing adaptions?	a complex structure may evolved from a simpler structure having same basic function
How was chitin modified to serve a additional function?	forms the exoskeleton of arthropods, help the challenge of dehydration
How were flippers of penguins modified for a new function?	the "flipper-wings" enable the penguin to "fly" through the water
Embryology	the study of the processes of multicellular organisms as they develop from fertilized eggs to fully formed organisms