For many years, there was no evidence of small plant-eating dinosaurs in modern-day North Texas. In fact, dinosaur fossils from about 100 million years ago in North America have been something of a rarity, making the history of the Mesozoic Era on the continent unclear. In a discovery that both disproves the conclusion that small plant-eating dinosaurs never lived in Texas and provides clarity on this era in the area, scientists from the Perot Museum of Nature and Science discovered a jawbone fossil near Lake Grapevine, Texas and determined it belonged to a small herbivorous dinosaur.According to the text, why was the Perot Museum’s discovery of the jawbone fossil significant?The jawbone fossil constitutes the first evidence found by scientists that herbivorous dinosaurs lived more than 100 million years ago.eliminateThe jawbone fossil helps establish that plant-eating dinosaurs’ defining features were their jawbones.eliminateThe jawbone fossil helps establish a more accurate timeline of the evolution of herbivorous dinosaurs in North America.eliminateThe jawbone fossil constitutes the first evidence found by scientists that small herbivorous dinosaurs existed in North Texas and gives a clearer picture of the Mesozoic Era in North America.

In 2023, scientists uncovered 100-million-year-old dinosaur and stingray fossils in a Maryland park. A group of paleontologists and volunteers discovered a theropod shinbone, the fossils of a Priconodon, an Ornithominmoid, a Deinonychus, and the remains of the oldest stingray in North America. The variety of the discoveries allowed researchers to classify the site as a “bonebed,” or a geologic layer that contains the remains of more than one species that existed during the same time period and in the same climate. This is the first bonebed (which are often considered the ultimate find in paleontology circles) discovered in Maryland since 1887. What does the text most strongly suggest about the site discovered by the researchers?The variety of fossils found at this site is unusual for the area and marks an important discovery. eliminateExcavations where this many species are found are more typical of the West Coast.eliminateMost East Coast excavations had only found isolated fossil discoveries, like individual claws and teeth of dinosaurs.eliminateThe bonebed was uncovered thanks to the help from members of the public.

In the 1980s, scientists at the New Mexico Museum of Natural History acquired a partial skull from a large adult from the genus Tyrannosaurus and identified the species as Tyrannosaurus rex. In 2013, Sebastian Dalman began working on the specimen and noticed small differences between the skull found in the 80s and other T. rex skulls in the museum's collection. The jaw of the New Mexico specimen was more slender, and its teeth lacked the prominent ridge of bone found behind T. rex’s eye. This evidence allowed Dalman to theorize that -------Which choice most logically completes the text?Tyrannosaurus skulls were frequently misidentified as T. rex.eliminatethe New Mexico specimen was a million years older than the T. rex.eliminateTyrannosaurus habitat ranged from North America to Alaska and Mexico.eliminatethe New Mexico specimen was another species of Tyrannosaurus entirely

Dinosaur fossils have been found in the town of Winton. They are around 9595 million years old. State whether this is older or younger than the fish fossils of Gogo Station. Older1Younger2

Which statement from the article best supports the idea that the Raptorex may not be an ancestor of the T. rex?A.Sereno believes that the Raptorex was a predator.B.…Drawings of what the Raptorex might have looked like show that there were differences between its appearance and that of the massive T. rex.C.It may have run down prey with its strong legs, killed with its powerful jaws, and clutched its victims with its two-fingered "hands."D.The newly found fossil looks a lot like T. rex fossils.SUBMITExtras

According to popular wisdom, Tyrannosaurus rex were legendary hunters; indeed, evidence of their hunting prowess lingers in the form of bite marks found on the bones of various herbivorous sauropod dinosaurs, like brontosauruses. That being said, some researchers have argued that many of these bite marks are lacking certain indicators that would imply that they were the result of hunting: namely, a lack of trace evidence of healing in the bones. Though this could mean that all the injuries were incurred in a single lethal encounter, it also could indicate that post-mortem scavenging is what led to the bite marks on the bones of the herbivores. This suggests that -------What choice logically completes the text? Tyrannosaurus rex may not have been responsible for the bite marks discovered on the sauropod bones.eliminatedespite the lore around their hunting skills, Tyrannosaurus rex may have also relied on the scavenging of already deceased dinosaurs to supplement their diet. eliminateTyrannosaurus rex were more skilled at hunting than was previously believed, and killed the majority of their prey in single, lethal attacks.eliminatesauropods were frequently able to outrun predators like Tyrannosaurus rex, unless they were ill or already dying.