Jun 27, 2018 · Zoology is a very broad field; zoologists study subjects ranging from single-celled organisms to the behavior of groups of animals. Some zoologists study the biology of a particular …

Zoology Sources Literature . Animals have a sanctified place in Islamic theology, so early Muslim writings about the animal world combined religion, scientific observation, and morality tales in which …

Jun 8, 2018 · Cnidaria Cnidaria is one of the more primitive animal phyla. It includes aquatic organisms such as jellyfish, sea anemones, corals, and hydras. Most cnidarians are marine, although a few, such …

Jun 8, 2018 · Nematoda (eelworms, roundworms, threadworms; phylum Aschelminthes) A class of worms (a phylum in some classifications) which vary greatly in size up to about 5 cm, although most …

gill 1. (in zoology) A respiratory organ used by aquatic animals to obtain oxygen from the surrounding water. A gill consists essentially of a membrane or outgrowth from the body, with a large surface area …

May 23, 2018 · crocodile, large, carnivorous reptile [1] of the order Crocodilia, found in tropical and subtropical regions. Crocodiles live in swamps or on river banks and catch their prey in the water. …

May 23, 2018 · Snakes Snakes are limbless reptiles with long, cylindrical bodies, scaly skin, lidless eyes, and a forked tongue. Most species are not poisonous, some are mildly poisonous, and others produce …

Agnatha A subphylum or superclass of marine and freshwater vertebrates that lack jaws. They are fishlike animals with cartilaginous skeletons and well-developed sucking mouthparts with horny teeth. …

May 18, 2018 · Marsupials Resources Marsupials belong to the order Marsupalia, one of three subclasses of mammals (Metatheria). Marsupials are named for the marsupium, which means “ …

May 21, 2018 · Annelida A phylum of invertebrates comprising the segmented worms (e.g. the earthworm). Annelids have cylindrical soft bodies showing metameric segmentation, obvious …