The frog has four legs, why does it always jump and walk?

<> therefore, it is not necessarily faster to run on 4 legs than 2 legs. However, if you compare humans to four-legged animals, humans can't outrun most four-legged animals. So why didn't humans evolve into four-legged animals that could run at high speeds like cheetahs?

Let's talk about this briefly.

It was found that chimpanzees used four times more energy on the treadmill than humans, that is, the energy that humans replenished with one banana would require four bananas. In this way, human walking upright can save energy to a certain extent, providing more time and energy for other survival and reproduction.

So they began to make all kinds of tools to defend against the enemy, and their hands became more and more dexterous, and finally they completely abandoned running with their forelimbs, and chose to walk on two hind limbs, and their hands were used to make tools, so in just a few million years, human beings evolved the technology that is so advanced today.

Humans are upright animals, but they can appreciate the inconvenience of ducks. You try to pick up a heavy pot and bend forward, then the center of gravity will move forward, the balance will be broken, and you will also come out of the swinging posture, so the duck walks and sways is the result of an unstable center of gravity.

It should be called a duck beauty!

At a glance, it is a mandarin duck, and it is even more charming and swaggering when it floats on the water.

A natural dance star, special dance steps.

Don't underestimate her, it's a super imitation show, you can learn the big white goose - goose goose goose, bend your neck to sing to the sky, white hair floating in green water, and anthurium plucking clear waves.

Compared with the penguin, its fate is indeed very good, as long as it does not go to the banquet, it is an idle cloud and wild crane, swimming among the mountains and rivers.

Animals also have spirituality, and they must not think about it, good!

Many functions of the body are not as advanced as many animals. Who wants to evolve into a stupid dinosaur-like human with a truck-sized body, a grape-sized brain, well-developed limbs, and a simple mind? Some races that are gifted in sports are intellectually deficient.

It is God's arrangement, God closes one door and opens another window for you. It is an illustration of the principle of compensation in nature. The human evolved brain at the cost of the withdrawal of certain bodily functions.

That's fair.

Frogs are also good swimmers on all fours, and they mainly use their hind legs when swimming. So its hind legs are much stronger than its forelegs. Therefore, it is more suitable for jumping than crawling frogs.

Because the frog's first two legs are generally used for paddling, and the back two legs are used for kicking water, it causes it to jump and jump when walking.

Because the frog stays in the pond and likes to swim, the hind legs are used to tread water, and the front row is used to give people a visual jump and jump, which is used to control the direction, otherwise it will fall.

The reason why it always jumps and walks is that it is an aquatic animal, and it always likes to swim in the pond, and everyone knows that it is the hind legs that work hard, and the hind legs are more developed than the forelimbs after a long time.

Because the frog mainly lives in the pond, and it mainly swims, the hind legs are mainly used when swimming, so the strength is particularly large.

Frogs walk hi bai

Joy jumping, this is because of green.

The frog likes to stay in the pond and is good at swimming. It mainly uses its hind legs when swimming, and its hind legs become very developed and much stronger than its forelimbs. Therefore, frogs are more suitable for jumping on their hind legs when walking.

If it crawls, it will be powerless because of the large difference in the growth of its front and rear limbs.

The forelimbs are short and consist of 5 parts: upper arm, forearm, wrist, palm, and fingers. 4 fingers, unwebbed between the fingers. During the reproductive season, there is a bulging protrusion on the inside of the base of the first finger of the male frog, which is called a marital tumor, which is used for holding the right.

The hindlimbs are long and well-developed, divided into 5 parts: femoral, tibial, tarsus, plantar and toe. 5 toes, webbed between the toes. There is a stiffer keratinized distance on the inside of the first toe.

Because this is caused by the physiological structure of the field chicken, the field chicken can not see stationary objects, but can only see moving objects at 45-60 degrees above the front, so jumping hunting, over time evolved to jump forward!

Because they can only jump, not walk.

Because its instinct can only jump、

Because it's faster to jump. Inclusion is welcome.

The frog has 5 toes on its hind feet. The body of a frog can be divided into 3 parts: head, torso, and limbs. Frogs have four toes on their front feet and five on their hind feet, and they also have webbed.

The frog's back is usually green, smooth and patterned, and its belly is white, which allows it to hide well in the grass, making it easy to catch prey and protect itself. The frog hunts with its tongue, which has mucus on it, and also helps it breathe.

There are 5 toes on the hind feet of the frog, 4 toes on the forelimbs, and the hind limbs are long and developed, divided into 5 parts: femur, tibia, tarsus, plantar and toe, with webbing between the toes, and a hard keratinized distance on the inner side of the first toe; The forelimbs are short, consisting of 5 parts: upper arm, forearm, wrist, palm, and fingers, and there are no webbing between the fingers. The smallest frog is only 5 centimeters, which is about the length of a person's thumb, and the largest is 30 centimeters (more than a foot long), and its body is short and broad.

Aquatic animals generally rely on the oscillation of the back of their bodies to generate forward momentum. For example, the fish moves forward by the tail fin, and the other fins only play the role of adjusting the posture and direction of movement. Similarly, tadpoles are also tail-moving.

The hind limbs of the frog are detached from the tail and are powerful aquatic locomotor organs. Frogs are also going to land in the event. Because his hind limbs are strong and his forelimbs are weak, jumping is the fastest way to exercise on land. Of course, he can also crawl slowly on all four legs.

Toads are more active on land, have reduced mobility in the water, and are not as powerful as frogs on their hind limbs. So toads are often seen crawling instead of jumping.

The reason for the structure of the body, just like people who don't jump and walk, is not that they can't, but that they have accumulated efficiency through evolution.

Because they are long and powerful in their backs and short in front legs.

Natural selection, survival of the fittest. Long-term environmental changes.

Because if you don't jump up and walk, it's uncomfortable.