Darwin proposed that the sutures in the skulls of young mammals were wonderfully adapted to aid in the passage through the birth canal,but he also argued that they could not have been originally adapted for that purpose.Studying the figure above,explain what evidence allowed Darwin to make that argument?
Definitions:
Flightless Bird
A bird that has evolved to lose the ability to fly, often due to changes in its habitat or predation pressures.
Pelicans
Large water birds known for their distinctive pouches under their beaks, belonging to the family Pelecanidae.
Incompletely Divided Ventricles
A heart condition where the ventricular septum does not completely separate the left and right ventricles.
Middle-Ear Bones
The three small bones in the mammalian ear - the malleus, incus, and stapes - that transmit sound vibrations from the eardrum to the inner ear.
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