Dino debate: predator or scavenger? (Chart Reading/Critical Thinking).
Argument for T. rex as Argument for T. rex as Predator Scavenge Good eyesight for spotting Large visual lobes in brain. carcasses miles away. Forward-facing eyes mean it had good depth perception, useful in hunting. Huge olfactory bulbs (part Huge olfactory bulbs for tracking Of brain used for smell) prey. for finding rotting animals. Arms too small to grab prey. Predators like snakes, sharks, and hawks hunt expertly with no arms! Huge legs built for covering Could probably run faster than the long distances--but not built plant-eating dinos it fed on. for speed. Had 50 to 60 long, serrated Banana-shape teeth for chomping teeth. But as cutting blades, Through flesh and bone. Regrew they weren't very efficient. broken teeth regularly throughout life. Too large, heavy, and clumsy Tail provided balance during quick to Wrestle around with prey. turns.
Use complete sentences and explain your reasoning. Support your answers by referring to traits of modern predators like alligators and modern scavengers like vultures.
1. Which type of animal--predator or scavenger--would need keener senses of sight, smell, and hearing? Why?
2. Do you think scavengers or predators need stronger jaws? Why?
3. Which type of animal would need the ability to scare away other animals?
4. Which kind of animal would need the ability to sneak up on animals?
5. Do you think T. rex was a scavenger, predator, or both? Why?
6. What kind of evidence do scientists need to resolve their debate?
DON'T STOP NOW:
For a long time, spotted hyenas were considered scavengers. Now evidence shows that in addition to scavenging, hyenas actually hunt and kill much of their food. What does this suggest about carnivores?
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|Title Annotation:||tyrannosaurus rex|
|Article Type:||Brief Article|
|Date:||Oct 15, 2001|
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