Will take place in the nucleus where the DNA is located
Answer:
oxygen enters blood cells by 'diffusion'
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I feel like it’s A or B but I have a strong feeling for A
The answer is mutation
of genes. The mutations were beneficial and gave the individuals of the population
advantage and hence increased their survival. The classic features of birds
evolved one by one and gave birds advantage over their dinosaurs counterparts, especially the feature of small size.
