Topics: bird

Topics: chordate, hemichordata, rattus rattus, mammal, bird, aves, amphibian, fish

Topics: Tilapia, Substrate spawners, Tilapia natalensis, Mouth brooders

Topics: Mammal evolution, Monotremata, Marsupiala, Insectivora, Rodentia, Edentata, Carnivora, Serenia, Chiroptera, Lagomorpha, Cetacea, Proboscidea, Primata, Artiodactyla, Perissodactyla

Topics: toad, Amphioxus

Topics: epithelial tissue

Topics: cellular metabolism, cell, genetic, development, taxonomy, phylogeny, unicellular eukaryotes, sponge, placozoan, cridarian, ctenophore, acoelomorpha, platyzoa, mesozoa, polyzoa, kryptrochozoa, mollusc, annelid, allied taxa, ecdysozoans, trilobites, chelicerates, myriapod, crustacean, hexapod, chaetognath, echinoderm, hemichordate, chordate, fish, tetrapod, amphibian, aminote, nonavian reptile, bird, mammal, support, protection, movement, homeostasis, digestion, nutrition, nervous coordination, nervous system, nervous coordination, sense organ, chemical coordination, immunity, animal behavior, animal distribution, animal ecology

Topics: Carboniferous Radiation, Caecilians, Gymnophiona, Salamander, Caudata, Amphibian, Paedomorphosis, Frog Life Cycle, frog, Tadpole, Fish

Topics: Scolidon, Dog fish, Hybodus, Chondrichthyes, galeoid sharks, Galeomorpha, Elasmobranch, Squalomorpha, Squaloid shark, Squalomorphi

Topics: Agama, Reptilia, Squamata, Sauria, Serpentes, Amphisbaenia, Chelonia