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The form of oxygen that combines three oxygen atoms into each molecule is called<span>. Poll Everywhere.
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Answer: Option B.
Explanation:
The first experiment of the passage shows that treatment with TGFBR1 and TGFBR2 antagonists led to lower levels of epithelial cell production. For this conclusion to be strongly valid, we want to show a positive correlation between TGFBR activity and epithelial proliferation.
<span>It increased! hope i helped! brainliest please!!
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