(CEB|SHL Talent Measurement) One of the animals that was prevalent during the dinosaur age was the mastodon. This mammal closely resembled an elephant and is now an extinct species, along with the sabre-tooth tiger and tyrannosaurus rex. One type of the mastodon species, the mastodon americanus, was as large as the modern Indian elephant. This mammal was common in the United States and became extinct about 8,000 years ago. Mastodons were very similar to elephants in appearance with their immense body structure, large head, and strong legs. In addition, they had long tusks that were arched and a muscular trunk. Mastodons were also covered with long, furry hair, much like the mammoth. However, the differentiating feature of the mastodon from the elephants and mammoths was their tuberculate teeth. These teeth were useful to the mastodons, which were herbivores whose diet was strictly composed of vegetation. Based on the description above, what did a mastodon most resemble?