Were there any animals and plants before the dinosaurs? What is the scientific basis?

When it comes to prehistoric animals, dinosaurs are often the first animals that come to mind. Still, despite the fact that this hugely successful group has roamed the planet for over 100 million years (and if you count the birds, they continue to this day), some of the less well-known animals further afield remain even more mysterious. After all, the world has changed immeasurably since animals existed for 7

500 million years and gave rise to some exotic creatures. The earliest terrestrial animals found so far are some kind of amphibians, which lived in the late Devonian period, more than 300 million years ago, long before the age of the dinosaurs - 100 million years - 65 million years ago.

Life is formed in the ocean, and there is basically no doubt in modern biology that the first life was microorganisms that could use the chemicals and heat energy in the ocean to synthesize their own substances, and then gradually primitive algae appeared, which could use light and carbon dioxide to synthesize the substances they needed. The emergence of primitive algae has greatly changed the earth's atmospheric environment, and the emergence of the ozone layer has made it possible for life on earth to survive on land.

A large number of plants and organisms began to migrate to land soon after the formation of the ozone layer, and among the original vertebrates, amphibians appeared, which could stay on land for a short time, and were moist and related to respiration, and gradually adapted to a longer period of life on land, and their living habits underwent major changes, and finally evolved into a diversity of terrestrial organisms. Dinosaurs were also vertebrates and were descendants of the original amphibians.

The size of the organisms in the age of dinosaurs was huge because of the huge number of land animals and plants, there was no shortage of food, and the survival competition of organisms made the size of animals continue to increase; On the other hand, higher oxygen levels (up to 30%) also have an impact on the body size of the organism. Herbivorous dinosaurs ate plants, carnivorous dinosaurs mainly preyed on herbivorous dinosaurs, and creatures were very prosperous in the age of dinosaurs, and there were many ferns and gymnosperms on the continent.

Yes. There were several other civilizations before the dinosaurs, and the first evidence is oil, which evolved from the corpses of animals and plants before the dinosaurs. The second piece of evidence is fossils, some of which are older than dinosaurs.

The third piece of evidence is the presence of deep-sea animals, which are older than the dinosaurs.

There were animals and plants before the dinosaurs, and the earth was ruled by amphibians and early reptiles hundreds of millions of years ago, and the plants were mainly ferns, all of which have fossil evidence, as well as rock evidence.

1. Build a gas dragon. It was a small, primitive carnivorous dinosaur with a body length of 4 meters and a weight of about 130-140 kilograms. Its main characteristics are a large and light head, dagger-shaped teeth with flat and sharp teeth, a short neck, strong and powerful hind limbs, sharp claws at the end of the toes, and it is good at running fast on both feet and preying on other animals, and it is a terrifying predator in the dinosaur fauna of Dashanpu.

2. Gan's Sichuan Dragon. Szechuanosaurus (scientific name: Szechuanosaurus) is a dinosaur of the family Sinoraptoridae. It lived in Asia during the late Jurassic period. It resembles a small Allosaurus in appearance, weighing about 100-150 kilograms and measuring about 8 meters in length.

3. Petroleum Karamaylong. It is a species of theropods, carnivorous dinosaurs, Allosauridae, and Karamayisaurus. Carnivorous, about 6 meters long, lived in the early Cretaceous, mainly distributed in China, fossils found in the Ordos Basin of Xinjiang, the material is some jaw fragments.

Karamayisaurus was a large carnivorous dinosaur from the early Cretaceous period.

4. Tyrannosauridae. is a broad term for carnivores with huge heads and short forelimbs. It was also one of the last carnivorous dinosaurs on Earth.

All members of the Tyrannosauridae family have the same characteristics except for slight differences in the distribution area, age, size, etc., the largest of which is the Rex Tyrannosaurus.

5. Chilongke. It is a group of theropod dinosaurs that resemble birds. They were group-sized medium- to small-sized carnivorous dinosaurs that flourished in the Cretaceous period. In informal usage, they are often referred to as "raptors".

1.Angiosperm.

2.Fern.

Correct Answer: Angiosperms.

The Jurassic period was the heyday of dinosaurs, and dinosaurs that emerged and began to develop in the Triassic period quickly became the rulers of the earth. All kinds of dinosaurs come together to form a world of ascending dragons.

The best available evidence of fossilized pollen grains and leaves suggests that angiosperms originated in the Early Cretaceous period, about 100 million years ago. In the older Cretaceous sediments, the angiosperm fossil record pales in number with fossils of ferns and gymnosperms. The Cretaceous period is after the Jurassic.

1.Tongue Sheep's Tooth: Tongue Sheep's Tooth is an arbor-like deciduous plant with a single leaf lanceolate or inverted-lanceolate, and the leaves are sheep's tongue-shaped.

2.Bennecycad: Bennecycad survived from the Triassic to the Oligocene, with a stubby stem and bisexual flowers.

3.Alder: Alder is a precious tree species left over from the Cretaceous Century.

4.Seed fern: Seed fern appeared in the Late Devonian and became extinct in the Cretaceous and is a primitive seed plant.

5.Cycads: Cycads are gymnosperms, dioecious.

In the plant community of the Boqing Dinosaur period, cycads, pines and ginkgo biloba in gymnosperms. Extremely prosperous. Among the ferns, horsetails, true ferns, and dense pines and cypresses, together with ginkgo biloba and arbors, form a dense forest, while herbaceous sheeptooths and other grasses are scattered in the lower parts and cover the ground.

In the drier areas, cycads and sheep's teeth grow, forming vast evergreen fields. Due to migration and evolution, the appearance of Jurassic flora tends to be similar in all regions of the earth, indicating that the air-based orange weather of the Jurassic is generally similar.

Inside the Carboniferous 100 million years ago, 100 million years ago.

Large horsetail, stone pine, fern.

Permian: 100 million years ago 100 million years ago.

The seed plants ginkgo biloba and pine grow abundantly.

Triassic billions of years ago 100 million years ago.

Cycads grew in abundance, and carnivorous dinosaurs appeared.

Jurassic billions of years ago, hundreds of millions of years ago.

New conifer species appear.

Cretaceous billion years ago 65 million years ago.

Flowering plants, including tree appearances

Although I don't know much about this, I usually like to see the animal world and people and nature, so I also know that there are 2 of them, crocodile and arapaima.

The age of dinosaurs was the Jurassic period, when dinosaurs were the most abundant among reptiles and dominated the land.

1) At that time, the animals that lived on land like dinosaurs were freshwater bivalves, gastropods, leaf-limbed and mesomorphs, as well as insects.

2) At that time, invertebrates included ammonites, arrows, foraminifera, radiolaria, bivalves, hexapods, gastropods, and brachiopods.

3) Gymnosperms entered their peak period in the Jurassic, with cycads, ginkgo biloba and pine and cypress occupying an important position, and only the remnants of seed ferns represent that true ferns are still flourishing in the Paleozoic.

Scientists have discovered a new dinosaur, which feeds on nectar. Scientists have not been able to determine their habits for all the dinosaurs that have been discovered so far, because everything can only be determined by scientists' inferences, and scientists' inferences are not necessarily correct, only that it is possible, and there is no accurate result, because scientists have not seen it with their own eyes, and scientists are not sure what the situation was like in the era when dinosaurs lived.

The dinosaurs discovered by scientists are all animals tens of thousands of years ago, and the earth's environment at that time was completely different from today's earth's environment, so all the scientists' understanding of dinosaurs is in the stage of speculation, and there is no absolute evidence to prove that the habits of dinosaurs that scientists have guessed are correct, because scientists are only based on some cognitions provided by modern science. Using modern thinking to imagine what kind of habits animals had tens of thousands of years ago cannot be taken seriously.

Scientists have discovered that the new dinosaur is the smallest of the dinosaurs, and that the dinosaurs that exist in this size can only feed on nectar. Because a dinosaur of this size can't beat anyone, and a scavenging dinosaur can't do it. So scientists judged that this small dinosaur fed on nectar, just like many small animals that exist today, relying on the nectar in flowers to sustain their lives.

Science is constantly progressing, in continuous development, at every stage there will be people to overturn the scientific views of the former Wang Moruler people, so the scientific views that seemed very correct in the society at that time may be overturned in the scientific development of later generations, so this kind of scientists guess the assertion that there is no master, just listen to the excitement, and don't take this kind of thing seriously.

It has a habit of living alone, prefers to be left alone, and is very fond of eating a variety of fish.

Scientists believe that the habit of the new dinosaurs was to eat a vegetarian diet. However, this is a reasonable speculation, and it is not very certain.

The habit of this dinosaur is that it likes to eat meat and has a sense of territory, and hates it very much to respect his dinosaurs to invade his territory, and it is a social type of dinosaur.

The first dinosaurs appeared about 100 million years ago, and for ease of study, dinosaurs can be divided into avian and non-avian dinosaurs. Among them, non-avian dinosaurs lived only in the Mesozoic Era (Triassic, Jurassic and Cretaceous) and were all extinct 65 million years ago.

The discovery of dinosaur fossils has a long history, and long before the Mantels discovered the avian dragons, Europeans knew that there were many huge fossilized bones buried in the ground. However, at the time, people did not know their exact attribution, so they were always mistaken for "the remains of giants".