Text-books Of Animal Biology A General Zoology ... Here

Before diving into specific animals, you need to understand the "rules" of life. Focus on:

Pay special attention to Echinoderms (starfish) and Chordates. TEXT-BOOKS OF ANIMAL BIOLOGY A General Zoology ...

Understanding natural selection and how traits are passed down. This provides the "why" behind animal diversity. Before diving into specific animals, you need to

Study the transition from water to land—from fish to amphibians, reptiles, birds, and mammals. 4. Animal Physiology: How They Work Compare how different animals solve the same life problems: Respiration: Gills vs. Lungs vs. Skin breathing. Circulation: Open vs. Closed systems. Before diving into specific animals

Does it have two layers (diploblastic) or three (triploblastic)?