Why do dogs and cats have four legs instead of two? 50

This is the evolution of evolution, from the earliest single-celled life to the present mammals.

Biological states exist in the form of natural selection, with advance and retreat. The reason why cats and dogs move on all fours is related to their way of survival, mainly on land, in order to pursue prey and escape from predators, running on all fours has become their natural choice.

The two-legged mammals are basically only humans, and that is also the evolution of human brains that can use tools.

All animals have four legs! Including people! Later, when people evolved to walk upright, their forelimbs evolved into upper limbs, and they were no longer called legs, but arms, and if dogs or other animals also evolved to walk upright,!!

We humans may not be as smart as them! Are we humans still the masters? It's possible to be dominated by them, hehe! ok。

Dogs and cats have 4 legs instead of two, and that's because each animal has different genes and evolved different genes, so the appearance is different. Species are diverse, and there is no need to dwell too much.

From a mathematical point of view, the three-point support is the most stable positioning, the cat and dog four legs called the positioning, but it wants to run and hunt at least one leg off the ground, then it still has to maintain the stability of the triangle, two legs, in the high-speed running is easy to fall.

Because dogs and cats are pure animals, their brains are different from humans, they can walk fast on four legs, and they can also catch food.

Why do dogs and cats have four legs instead of two? Because dogs and cats are born with four legs. You have to ask the scientists.

I don't think there's anything to discuss about this, it's born that way.

This is what the gods created when they created things.

If you can't balance just two legs.

1. This is determined by the dog's physiological characteristics and living environment.

2. The speed of a dog can generally reach 50 kilometers per hour, while the speed of ordinary people is less than 40 kilometers per hour. I believe that many people can name the reason why dogs run faster than humans, and one of the theories is that dogs have four legs and are physiologically more suitable for running than humans.

Night owl two-legged.

It's a brain teaser, all cats are four-legged, only cats that aren't cats have two legs. Includes:

1. Night owls, people who like to stay up late, or who are refreshed at night.

2. Night owl, another name for owls.

Answer: Night cats are two-legged.

Analysis: "Night cat" is a description of a person who is still active at night and does not sleep, so "night cat" has two legs.

What cat has two legs" and the complete riddle:

What cats, two-legged;

What pigs, without mouths;

What a donkey, without hair;

What a book, without words;

What a room orange trace, there is no door;

What flowers, without leaves.

Mystery: The night cat has two legs, the raindrop (pig) has no mouth, the bald donkey has no hair, the book has no words, the atrium has no door, and the snowflakes have no leaves.