UJIAN PRAKTEK TIK KELAS 9
Fish are members of poikilothermic (cold-blooded) vertebrates that live in water and breathe through gills. Fish are the most diverse group of vertebrates with more than 27,000 species worldwide. Taxonomically, fish belong to a paraphyletic group whose kinship relationship is still debated; fish are usually divided into jawless fish (class Agnatha, 75 species including lampreys and hags), cartilaginous fish (class Chondrichthyes, 800 species including sharks and rays), and the rest are classified as bony fish (class Osteichthyes). Fish in various local languages are called iwak Ikan adalah anggota vertebrata poikilotermik (berdarah dingin) yang hidup di air dan bernapas dengan insang . Ikan merupakan kelompok vertebrata yang paling beraneka ragam dengan jumlah spesies lebih dari 27,000 di seluruh dunia. Secara taksonomi , ikan tergolong kelompok paraphyletic yang hubungan kekerabatannya masih diperdebatkan; biasanya ika...