📅 NSB 2019🎓 HS🔄 Round 13#️⃣ Q13🌟 BONUS✍️ Short Answer
Several important evolutionary features only evolved once in history. Identify all of the following three features that are known to have evolved a single time: 1) C4 photosynthesis; 2) Amniotic egg; 3) Feathers.
✔️Answer:2, 3
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