The barrier is cultural differences.
John, growing up in America learned that eye contact is a way of respect and to show you are paying attention.
Where Cho, growing up in Asia, many Asian counties don't have this "custom" to call it that.
Answer:
D) largest mass extinction event in Earth's history
Explanation:
The cambrian era started following the pre-cambrian extinction
Carbon dioxide is a reactant and oxygen and glucose are products.
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- - Because you take in both genes from your parents. It is most likely to have more of your dads genes rather than mom though.
A hypothesis is something that you predict and a theory is something that is capable of becoming true