The answer i believe is d.
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Answer: They had more food to support more people.
Explanation:
Answer:
parents with AB and O blood types can either have children with blood type A or blood type B. These two types are definitely different than parents' blood types!
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I believe that hair and limbs are homology because all mammals have hair and similar limb structure. Hair loss and social behavior on the other hand are homolasy because not all mammals have them. Homology is the similar traits due to common ancestry while homoplasy is similar traits for other reasons other than common ancestry.
Without sunlight plants can undergo photsynthesis and cannot produce oxygen for humans to breathe and would cause the humankind to go extinct.