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Primitive Animals
Life, as we know it today, is presumed to have started in the sea and many of them were likely eukaryotic animal-like organisms. Because of the expanding diversity of animal life forms, taxonomists eventually came up with a classification scheme to group them into various phyla. Know more about the early animals that were likely the first ones to roam the ancient seas through this tutorial...
Animal Water Regulation
Animals adapt to their environment in aspects of anatomy, physiology, and behavior. This tutorial will help you understand how animals adapt to their habitat. For instance, how animals thrive in aquatic habitat and are able to overcome osmosis. It also sheds light on the reasons animals adapt...
Arthropods
The arthropods were assumed to be the first taxon of species to possess jointed limbs and exoskeleton, exhibit more advanced receptors in the form of eyes, and develop various chemoreceptors. Since they possess such desirable features, their survival over the long term is apparent by their genetic diversity. Learn more elaborate details about arthropod evolution in this tutorial...
The Dinosaurs
Dinosaurs represented a major turn in the evolutionary development of organisms on Earth. The first dinosaurs were presumed to look a lot like the reptiles. As they continued to evolve, many of them became bigger and stronger. Read more about the evolution of dinosaurs and their subsequent extinction in this tutorial...