🧬4️⃣🧩

#DNA bases #four bases #ATCG #nucleotide #biology 4

🦠➡️🧬🧬🔢4️⃣

#mitosis stages #four stages #cell cycle #cytology #biology 4

🔬🧬🎓4️⃣

#advanced biology #biology 400 level #biology course #university biology #science major #biology 4

🐾4️⃣🌳

#tetrapods #four limbs #vertebrate evolution #evolutionary biology #biology 4

🫀➡️4️⃣🚪

#heart chambers #four chambers #circulatory system #biology 4