EARTH SCIENCE
← Back

Science Bowl Question

📅 NSB Regional 2007🎓 HS🔄 Round 4#️⃣ Question 19🌟 BONUS📝 Multiple Choice

In which period of the Geological Time Scale did trilobites first appear:

W) Permian
X) Cambrian
Y) Devonian
Z) Silurian
🚀

Take Your Prep to the Next Level

Practice with interactive modes, adaptive testing, and detailed stats on our main app.

Launch Interactive Practice