Essay topics: TPO-04 - Integrated Writing Task
Endotherms are animals such as modern birds and mammals that keep their body temperatures constant. For instance, humans are endotherms and maintain an internal temperature of 37°C, no matter whether the environment is warm or cold. Because dinosaurs were reptiles, and modern reptiles are not endotherms, it was long assumed that dinosaurs were not endotherms. However, dinosaurs differ in many ways from modem reptiles, and there is now considerable evidence that dinosaurs were, in fact, endotherms.
One reason for believing that dinosaurs were endotherms is that dinosaur fossils have been discovered in Polar Regions. Only animals that can maintain a temperature well above that of the surrounding environment could be active in such cold climates.
Leg position and movement
There is a connection between endothermy and the position and movement of the legs. The physiology of endothermy allows sustained physical activity, such as running. But running is efficient only if an animal's legs are positioned underneath its body, not at the body's side, as they are for crocodiles and many lizards. The legs of all modern endotherms are underneath the body, and so were the legs of dinosaurs. This strongly suggests that dinosaurs were endotherms.
There is also a connection between endothermy and bone structure. The bones of endotherms usually include structures called Haversian canals. These canals house nerves and blood vessels that allow the living animal to grow quickly, and rapid body growth is in fact a characteristic of endothermy. The presence of Haversian canals in bone is a strong indicator that the animal is an endotherm, and fossilized bones of dinosaurs are usually dense with Haversian canals.
Summarise the points made in the lecture, being sure to explain how they challenge the specific points made reading passage.
|Post date||Users||Rates||More about the essay|
|4 days 11 hours ago||ying.ma||81.5||Read full essay|
|1 month 3 days ago||manjinder kaur||76||Read full essay|
|3 months 2 weeks ago||dhani||73||Read full essay|
|3 months 2 weeks ago||dhani||73||Read full essay|
|3 months 3 weeks ago||toeflibt.ara||81||Read full essay|
|4 months 2 days ago||toeflibt.ara||76||Read full essay|
|4 months 2 weeks ago||daniel8564||80||Read full essay|
|5 months 3 weeks ago||Toefl2016||82.5||Read full essay|
|5 months 3 weeks ago||mamut343||73||Read full essay|
|6 months 2 days ago||koku||90||Read full essay|
- TPO-49 - Integrated Writing Task Like many creatures, humpback whales migrate long distances for feeding and mating purposes. How animals manage to migrate long distances is often puzzling. In the case of humpback whales, we may have found the answer: the (100)
- TPO-48 - Integrated Writing Task In recent years, many frog species around the world have declined in numbers or even gone extinct due to changes in their environment. These population declines and extinctions have serious consequences for the ecosystems (100)
- TPO-47 - Integrated Writing Task Pterosaurs were an ancient group of winged reptiles that lived alongside the dinosaurs. Many pterosaurs were very large, some as large as a giraffe and with a wingspan of over 12 meters. Paleontologists have long wondered (100)
- TPO-46 - Integrated Writing Task In the United States, medical information about patients traditionally has been recorded and stored on paper forms. However, there are efforts to persuade doctors to adopt electronic medical record systems in which informa (100)
- TPO-45 - Integrated Writing Task Any student of paleontology will be struck by the fact that a great many animals of the past were considerably larger than they are today. This holds true for species ranging from dinosaurs to most mammals. Just why they w (100)
- TPO-44 - Integrated Writing Task In 1957 a European silver coin dating to the eleventh century was discovered at a Native American archaeological site in the state of Maine in the United States. Many people believed the coin had been originally brought to (100)
- TPO-43 - Integrated Writing Task Agnostids were a group of marine animals that became extinct about 450 million years ago. Agnostid fossils can be found in rocks in many areas around the world. From the fossil remains, we know that agnostids were primitiv (100)
- TPO-42 - Integrated Writing Task Glass is a favored building material for modern architecture, yet it is also very dangerous for wild birds. Because they often cannot distinguish between glass and open air, millions of birds are harmed every year when the (100)
- TPO-41 - Integrated Writing Task Burning coal in power plants produces a waste product called coal ash, a material that contains small amounts of potentially harmful chemicals Environmentalists in the United States are concerned about the damage such harm (96.66670000000001)
- TPO-40 - Integrated Writing Task Many scientists believe it would be possible to maintain a permanent human presence on Mars or the Moon. On the other hand, conditions on Venus are so extreme and inhospitable that maintaining a human presence there would (100)