1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Diano4ka-milaya [45]
3 years ago
15

In what age did the T Rex exist

Biology
2 answers:
yanalaym [24]3 years ago
6 0

Answer:

65 million years

Tyrannosaurus rex, "tyrant lizard king", or T. rex for short, was a dinosaur that lived on Earth about 70 to 65 million years ago, during the Cretaceous period.T. rex is one of the largest carnivorous (meat-eating) dinosaurs ever discovered. It is also quite likely the best-known dinosaur of all.Tyrannosaurus rex was up to 13 meters (42 feet) long and 4 meters (13 feet) tall, and weighed 4 to 6 tons (8,820 lb to 13,220 lb) – longer than a bus, and as heavy as an elephant. That's as an adult. T. rex when first hatched was probably about the size of a turkey. T. rex had a forward tilt, deep jaws, huge teeth, a long tail, and tiny arms (also known as forelimbs).

T. rex's jaw alone was about 1.3 meters long and had fifty to sixty bone-crunching teeth that were up to 10 centimeters or 6 inches long. Its arms were very stubby, no longer than an average person's. They were still very strong, able to lift up to two hundred kilograms, but were not long enough to touch each other! T. rex stood on two powerful hind legs, each ending with a three-toed foot, resembling a bird's foot, only much larger.

T. rex was a very big meat-eating dinosaur, also called a carnivore. It would have been at the top of the food chain. It is known to have fed on other large dinosaurs, such as Edmontosaurus, Anatosaurus, and Triceratops, and probably could have swallowed smaller dinosaurs in a single bite.

One scientist believes that T. rex was a scavenger (an animal that eats already dead animals). He argues that it might not have been fast enough to catch prey. Other scientists believe that T. rex probably scavenged and hunted, like most living meat-eaters (such as tigers and lions). T. rex bite marks found on the bones of Edmontosaurus and Triceratops that have healed show that Tyrannosaurus did hunt at least some of the time – and also that its prey was sometimes lucky enough to escape.

One thing that T. rex did not eat was people. People didn't appear on Earth until over 60 million years later, much too late for anyone ever to be afraid of being hunted down by a T. rex.

Tyrannosaurus lived about 70 to 65 million years ago, in the late Cretaceous Period. T. rex was among the last of the big dinosaurs. Like all non-bird dinosaurs, T. rex lived in the Mesozoic era.

Tyrannosaurus is believed to have lived in forests, near rivers, and in areas that were open and full of prey. Mild seasons would have been most favorable to it. Tyrannosaurus fossils have been found in western North America and possibly Asia.

The famous fossil hunter Barnum Brown found the first Tyrannosaurus fossil in 1905. Tyrannosaurus was not the dinosaur's name until 1905, when it was given that name by Henry Fairfield Osborn. About 3,000 Tyrannosaurus fossils have been found, from pieces of teeth to nearly complete skeletons. Only one possible Tyrannosaurus footprint has been found.

The color of their skin. One thing we cannot tell from fossils is color!

Whether T. rex was feathered, scaly, or both. Some of its cousins had feathers like birds, while others had scales, so it likely had both.

Whether T. rex was just a scavenger or a scavenger and a hunter. There are very few hunting animals that will not scavenge, and very few scavengers which never hunt.

If T. rex had the ability to run.

Was it really the largest predator? In 1995, parts of a predator that seems even larger than T. rex were found in Argentina! It was called Giganotosaurus and was about 45 ft long (about a meter [yard] longer than T. rex). Since then, parts of even larger carnivorous dinosaurs, such as Spinosaurus and Carcharodontosaurus, have been found.

HOPE THIS WAS HELPFUL!

Aleks04 [339]3 years ago
5 0

T-rex lived in the Late Cretaceous period during the Mesozoic era. Dunno if this was precisely what you were looking for, but I hope it's helpful!

You might be interested in
Why has the kingdom protista been abandoned? see concept 28.1 (page 592) view available hint(s) why has the kingdom protista bee
liberstina [14]
The answer is the second and third answers. Kingdom Protista is a polyphyletic taxon, meaning they did not evolve from one common ancestor, unlike what you see from a monophyletic taxon. Because they come from multiple ancestors, they share more similarities with other organisms from other kingdoms, rather than themselves.  
4 0
3 years ago
Which of these indicates equilibrium in the community? A. seral B.pioneer C.ultimate D.intermediate E.climax
SOVA2 [1]
E.climax, because the climax community is composed of species best adapted to average conditions in that area.
4 0
3 years ago
Read 2 more answers
Tom is having difficulty dorsiflexing and inverting his right foot. Which muscle is most likely involved in this problem
mariarad [96]

Answer:

It should be the tibialis anterior

Explanation:

I hope this helps!

4 0
3 years ago
How do baroreceptor reflexes would respond to a fall in blood pressure?
RoseWind [281]

Answer:

Barroreceptors are specific type of receptors that are present within the membrane or wells of the blood vessels and monitor the changes occur in blood pressure.

The major and important barroreceptors are located in carotid sinus and the aorta for detecting fluctuation in the blood pressure. If blood pressure falls these receptors firing rate decreases and barroceptors reflexes act to increase heart rate in order to restore blood pressure in an individual.

Thus, the correct answer would be - increasing heart rate.

3 0
3 years ago
The cell walls of a plant consist mostly of cellulose, a carbohydrate, which provides a strong structure. The cell membrane gets
disa [49]
The answer would most likely be sodium because carbon is a plants food, phosphorus is a nutrient in soil, hydrogen is air, but sodium does not have a place in a plant:)
7 0
3 years ago
Read 2 more answers
Other questions:
  • A gardener is concerned that her greenhouse is getting too hot from too much light and seeks to shade her plants with colored tr
    15·1 answer
  • What is the function of cellulose in plants
    14·2 answers
  • During a total lunar eclipse what happens
    6·2 answers
  • HURRYYY !!!! <br> Which statement describes how technology has increased our information on mars ?
    14·2 answers
  • Compare and contrast what happens to an animal a plant and a paramecium cell in a hypotonic and isotonic and hypertonic solution
    6·1 answer
  • what would happen if there was an increase in the number of free hydrogen ions or protons in the intermembrane space of the mito
    7·1 answer
  • Explain why the human population must seek balance between the need for food and environmental protection
    15·1 answer
  • WHO CAN HELP ME IN BIOLOGY PLEASE!!!
    5·1 answer
  • I will give brainliest!!!!
    8·1 answer
  • Which of the following is a function of the cell membrane?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!