Animals are heterotrophic, meaning they depend upon other organisms—crops and/or other animals—for his or her food, as they can't synthesize their own individual meals as crops do by means of photosynthesis. Vertebrates make up a self-contained group: the subphylum Vertebrata. Invertebrates belong to many alternative groups. Caecilians are burrowing animals https://gregorynjcvn.wikimeglio.com/9970413/not_known_factual_statements_about_animal_porn