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Animal Infobooks I Seaworld Parks & Leisure Animals with this bilaterally symmetric physique plan and a tendency to maneuver in one direction have a head finish and a tail finish in addition to a again and a stomach ; due to this fact they also have a left facet and a proper aspect. They produce haploid gametes by meiosis; the smaller, motile gametes are spermatozoa and the larger, non-motile gametes are ova. These fuse to form zygotes, which develop by way of mitosis into a hollow sphere, referred to as a blastula. Recent research has sophisticated the taxonomic classification of rat snakes. Green sea turtles are an endangered species, which as juveniles are prone to the debilitating illness green turtle fibropapillomatosis . Previous work has proven an association between lowered immune operate and FP. Lameness is a painful medical condition of the bovine locomotor system that ends in alterations of motion. Together with mastitis and infertility, lameness is the principle welf