📅 NSB Middle School 2021🎓 MS🔄 Round 9#️⃣ Question 14🌟 BONUS✍️ Short Answer
Prematurely-born mammals have a difficult time breathing. This is because they lack what substance that coats mature lung alveoli [al-VEE-uh-lye] to reduce surface tension?
✔️Answer:SURFACTANT
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