<span>Desirable traits become more common in populations because of the process of natural selection.</span>
Mitochondria and chloroplasts likely evolved from engulfed prokaryotes that once lived as independent organisms. At some point, a eukaryotic cell engulfed an aerobic prokaryote, which then formed an endosymbiotic relationship with the host eukaryote, gradually developing into a mitochondrion.
Your answer is B. carbohydrates. hope this helps
Answer:
During formation of the luteum.
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