SORU: paragrafta boş bırakılan yere uygun düşen cümleyi bulunuz
Life on Earth began in the oceans with small, single-celled organisms. …………… Over the millennia, these land creatures adapted themselves to the air, while those in the sea continued to evolve in a way which suited underwater life. Some species, the ancestors of amphibians, however, lived both on land and in water.