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Hipervinculo Biología
Covers use of vestigial structures and embryology in understanding evolution.
It is an educational content of CK-12 Foundation (to access some of the CK-12 contents you must be logged in).
Hipervinculo Ciencias de la Tierra y Medioambiente
The common ancestor of theropod dinosaurs is a small, non-specialized reptile.
It is an educational content of CK-12 Foundation (to access some of the CK-12 contents you must be logged in).
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