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Plant eating dinosaurs are referred to the same way plant eating animals are classified today. The word you're looking for is herbivores

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Most animals, (including humans), evolved in prehistoric times. It is far harder to name an animal that has evolved after prehistoric times.

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Some good examples of blueprints of animals that have existed for millions of years are sharks and another species of fish I can name is the Coelacanth that is still around today :).

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converse; chat

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Saber toothed cats were not built for speed. Instead, they would have hunted by using stealth to get close to their prey. They would then use their muscular forelimbs to tackle it. They could probably run up to 25 mph.

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Sea horses do eat plankton.They also eat fish larvae.

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The most widely accepted definition of sentience is possessing the cognitive ability to think for oneself autonomously and experience subjectivity.

However, for others, the innate ability to experience pleasure and pain defines sentience. However, this is a very loose definition, given that pleasure and pain are merely one axis of information-encoding phenomena. Therefore, cognitive autonomy and subjectivity is more accurate.

When most people speak of "dinosaurs", they are usually speaking of the birds and lizards that existed prior to the tertiary period. In such a case, we can say that dinosaurs are not sentient. The reptilian brain is not capable of the level of cognitive ability that we common define as "sentient".

Yet, if you are very loosely using the term "dinosaur" to mean anything from before the tertiary period forward, then you can say that, yes, the smaller lifeforms that evolved along the same lines as the hominids (smaller animals that would have been prey to the larger, carnivorous lizards long ago) did end up becoming humans.

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This is a tricky question for many scientists for two reasons. The first being that feathers cannot be fossilized with the bone. We have to look for their imprints in the surrounding rock, and even those are rare. The second is that the line between dinosaur and bird is very thin. If you mean all dinosaurs includingbirds, then primitive fliers such as Archaeopteryx had the first feathers. If not, then a Early Cretaceous genus called Sinosauropteryx is the first known non-avian (not a bird, per se) dinosaur to have feathers.

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65 million years ago

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Not all ratites are large (the kiwi bird is rather small, for instance), but the simplest answer is that giving up flight (all ratites are flightless) enabled the ratites to achieve greater mass and size since they no longer had to remain light and small for aerodynamic purposes. Being large also helps with thermoregulation, fending off predators and, in the case of birds, digestion (since they can accomodate a larger stomach and longer intestines and therefore extract more nutrition from vegetation).

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mostly fish, but also mollusks such as ammonites

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A trilobite is an extinct three lobed arthropod dating to the early Cambrian Period through to the late Permian period. These fossils can be purchased from as little as one USD through to several hundred dollars.

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The time before humans developed written language.

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Thrinaxodon lived during the Triassic Period. They died out about 245 million years ago, at the end of the Olenekian portion of the Triassic period.

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According to Wikipedia there is a controversial theory that the giant dragonfly-like insect, Meganeura, was able to grow to a large size due to the higher partial-pressure of oxygen in the atmosphere at the time it existed.

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The oldest fossils in the world are found in western Australia and are those of primitive bacteria. They are about 3.5 billion years old.

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It is very likely that all dromeosaurs (the clade to which Deinonychus belonged) had feathers, although for Deinonychus specifically none have ever been found. It is known for a fact that very closely related dinosaurs were feathered and therefore Deinonychus probably was too.

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All cave paintings were made by modern humans. They were usually made in caves that had no habitation and were hard to access, so they may have served a religious purpose. Usually the subjects of cave paintings were large animals such as bison, reindeer, horses, mammoths, etc. They also occasionally painted carnivores, such as the cave hyena.

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the whole way of life underwater would change because the lesser species would slowly become larger and larger in population and eventually kill other species by eating all of the resources available.

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it got its name from per meaning pea and mian meaning ancient myans

The Permian period was named in 1841 by the geologist Murchison after a tour ofImperial Russia to include the "vast series of beds of marls, schists, limestones, sandstones, and conglomerates" that overlay the Carboniferous formations in the eastern part of the country. He named it after the ancient kingdom of Permia and the present city of Perm near the Ural mountains.

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The earliest direct evidence for true mammalian life lies in a single fossilized brain case, found in China and described by Zhe-Xi Luo and Ai-Lin Sun in the 2001 issue of Science. The find, named Hadrocodium wui, dates to around 195 million years ago, placing the origin of true mammals sometime before the early Jurassic Period and perhaps even the late Triassic Period.

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The Permian-Triassic extinction event was probably caused by tremendous amounts of carbon dioxide that were released from a huge volcanic flow in what is now Russia. This carbon dioxide would have warmed the Earth 5 degrees Celsius (9 degrees Fahrenheit) on average, which would have been enough to evaporate deposits of methane on the ocean floor. This would have warmed the Earth an additional 5 degrees Celsius, for a total rise in average temperature of 10 degrees Celsius (18 degrees Fahrenheit). That would have caused catastrophic climate change, and may have also caused the oceans to lose oxygen content. This would have killed many marine species, and created an ideal habitat for bacteria that create hydrogen sulfide gas. This gas would poison many organisms, on top of damaging the ozone, so that UV light could harm any surviving organisms. 90% of species on Earth died out in this mass extinction.

The Cretaceous-Tertiary Extinction Event was probably caused in part by climate change due to volcanoes releasing carbon dioxide. This climate change weakened many of Earth's species. Then, when an asteroid impacted the Earth and covered the sky in a thick layer of dust, blocking nearly all sunlight, plants died, and so did the animals that depended on them. There is some evidence that the dinosaurs actually survived the first asteroid impact, only to be wiped out by a second impact only 200,000 years later.

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Yes thet do. Just like we have a spine, they had a spine, they have a skull we have a skull.

Simple answer is just yes.

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It was not made. They did not use gas or oil back then. Oil which seeped out at the surface ( more like tar as the gas and lighter part would dissipate into the atmosphere) was used.

Crude oil, natural gas, and coal are made when biological material (usually algae) is buried beneath the surface of the earth and slowly cooked under the pressure of the earth above. This process can be observed today at the bottom of the oceans where algae flourish. If you are referring to how it was used - then it was a rare commodity, but the Chinese used it for heating, and the Zoroastrians believed it to be a way of communing with spirits; that is when natural gas seeped from the earth and caught fire. Spirits were said to be whispering in the flames.