Why did carnivorous, herbivorous and omnivores evolve? 5

It's actually the environment, and animals eat everything when they can't find something to eat, including their own kind, like the salamander in South America, and they eat their own kind to live without food.

If you want to get to the bottom of it, it's the phagocytosis between cells, because there was a beginning on the earth, and animals began to eat the weak, and if you say that carnivores want to eat meat, it's because there are nutrients in meat that can't be obtained, such as protein, which is not available in plants.

For example, why cats only like to eat fish and mice because there is a yellow color in fish and mice. I forgot about that substance, and it's because of that substance that cats can move and hunt at night.

Personally, I think it's impossible to evolve into carnivores or herbivores or omnivores. Because there is simply not enough food to support so many species, such as carnivores, they all eat meat, how can there be enough meat, I think the strong eat meat, the weak eat grass, and the rest of the omnivores are also in line with the natural ecology and natural selection, the choice of the environment.

Because the competition is too big in the past, if it is all herbivores, then the grass must not be enough, if all are carnivores, then the animals bite each other There are probably no animals in this world, and of course there will be no humans. And there are herbivores and meat, these two animals are the same as the yin and yang theory in our country, and they are indispensable to each other.

Because I'm tired of eating, change them one by one...

Horns are one of the distinctive features of the heads of many herbivorous mammals, and there are four types of horns according to their "material": cavernous horns, skin and bone horns, deer antlers, and rhino horns. Their horns are usually not bifurcated, but are pore angles consisting of cuticles, bony nuclei, wavy angles; The bony horn is a horn made of cartilage in the head.

In nature, only members of the giraffe family have bony horns. Antlers are made from living skulls. Antlers are usually bifurcated and can shed and regenerate naturally, representing that the animal is a member of the cervidae family.

Rhino horn is also rhino horn, which is formed by keratinization of the epidermis of the head of the rhino horn, and the rhino horn is solid.

Any kind of nerve cell becomes very difficult after it is fully developed. Most antlers, male deer have more prominent antlers than females, and like many cervids, females do not have antlers. This is because of differences in sex selection.

Herbivorous mammals have to fight with males in order to gain reproductive rights, and they are all males. Herbivores also have teeth and bites, making it difficult to repel opponents with bites in duels of their kind. Some male herbivores have ** in their heads, and when they have ** in their heads, their power will be revealed.

Most of the duels of herbivores are to hit the opponent, by running the head has a hard "**", which not only protects the skull, but also inflicts damage on the opponent, therefore, the angles of various "materials" appear, and when the angles appear, the horned males are always able to gain an advantage in the competition, and the genes of this angle are passed down from generation to generation through heredity. Most male herbivorous mammals have horns to compete with. The second is defense.

In nature, carnivores have little defense against predators, so most herbivores are good at running, which is the only skill that some hornless female herbivores have to survive.

It is inevitable that most herbivorous mammals will have horns, not only to increase their competitiveness with each other, but also to strengthen their ability to defend themselves against predators if necessary. Horned animals, mainly males are thicker than females, which is due to the higher frequency of use. For herbivores it is a tool for competition and defense, and for predators, they mostly have sharp claws and teeth, and "**" will not only give the predator a strong ability to compete and defend, but also make them have a strong offensive ability, so it becomes less important to have any angles.

Herbivores and predators are the same, herbivores choose very easily available plant foods, the tooth structure is adjusted to a food suitable for grinding coarse fibers, and at the same time they lose their important attack ** sharp canine teeth, so in order to compete in the same competition, and with the best chance of survival in the face of predators, they choose to break down the ** or bones of the head, and therefore the horns.

From an evolutionary point of view, most herbivores have horns, but carnivores do not, this is because in the process of evolution, herbivores may have evolved super running ability in order to escape from predators, and some have evolved defense** when they can't run, horns are actually defense**, all in order to survive, while carnivores have evolved attack ability and predatory ability.

The horns of herbivores can better protect themselves, and carnivores need some aggression, so their teeth are sharper.

This increases the competitiveness of herbivores and contributes to their survival, which is good for these animals.

Because carnivores do not need horns, most of the time horns are used for courtship, so carnivores do not have horns.

Herbivores: Animals that live solely on plant tissues. It encompasses a wide range from insects to large mammals, but the term most commonly refers to ungulate mammals.

Adaptations to plant-based food macrophytes include the four-chambered stomach of ruminants, the growing incisors of rodents, and the specialized grinding molars of cattle, sheep, goats, and other bovids.

Carnivores: Commonly known as beefing blue-limbed beasts or carnivores. The teeth are sharp and powerful, with carnivorous teeth, i.e., the last premolar of the upper jaw and the first molar of the lower jaw; The two large cusps of the upper fissure and the two large cusps on the outside of the lower fissure act like a guillotine when biting, which can cut the ligaments and cartilage.

The large teeth are unusually thick, long and pointed, quite sharp, and play a puncture role.

Omnivores: Among mammals, there are many categories that are omnivores.