Jackson Tucker, who works in the inaugural class of zookeepers at the St. Louis Zoo’s new WildCare Park in North County, has been connected to this zoo for almost all of his 24 years on Earth. His family celebrated his first birthday at the St. Louis Zoo. At 20, he landed his first internship at the zoo’s River’s Edge attraction. Now, after graduating from Michigan State University with a degree in zoology, he is helping prepare the zoo’s new 42…