Answer:
The first one
Explanation:
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Scientists compare the anatomy, embryos, and DNA of living things to understand how they evolved. Evidence for evolution is provided by homologous structures. These are structures shared by related organisms that were inherited from a common ancestor.
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When you breathe your diaphragm contracts and moves downwards. This increases the space in your chest cavity, and it allows your lungs to expand into it. This is beneficial because it decreases pressure and drives air into our lungs
Loggerhead sea turtle and Olive ridley sea turtle
