is mainly aboutc.It moves in the same direction as the body.A.why humans don't have tailsd.It works like a seahorse tail.B.how tails help animalsA.abcB.abdC.the importance of helping old peopleC.acdD.bedD how the robotie tail ran belnWalk like an animal Can people have tails(尾巴...
Millions of years ago, humans didhave tails, but we slowly lost them. However, Keio University in Japan hasinvented a robotic tail for old people to help them keep their balance.The tail is 1 meter long. People can wear it around their waist(腰) tokeep their balance. “The tail keeps...
Related: What if humans had tails? Jumping genes and "dark matter" Over millions of years, changes in DNA allow animals to evolve. Some changes involve only a single rung in DNA's twisted ladder, but others are more complex. So-called Alu elements are repetitive DNA sequences that can ...
Millions of years ago, humans did have tails , but we slowly(1)l_ them . As we know, many animals have tails and they are useful . T ails not only help them keep their balance (2)w___ walking or running, but also have other uses . For example, monkeys use their tails to clim...
We humans crouch or walk upright, so it seems that we no longer need a tail. However, a university in Asia has built robotic(机器人的) tails for old people. They can w4the tails to help keep their balance. The tail is about one meter long. When people walk one way, the tail moves...
【题目】Why don't humans har e tails ()? Millions of years ago, humans did hav e tails, but w e slowly l ost them. Howerer, Keio University in Japan has bui lt a robotic tail for old peopl e to help them keep thei r balance.T h e tail is 1 meter long. Peopl e can wear...
Millions of years ago, humans did have tails, but we slowly 11 them. Aswe know, many animas have tails and they are useful. Tails not only help them keep their balance w_2 walkingor running, but also have other uses. For example, monkeys use theirtails to climb. Dogs and cats use ...
So, humans don't have tails because our ancestors found no use for them, and over a long period, tail-bearing individuals became less common in the gene pool. Today, our lifestyles are much different than our tree-dwelling ancestors, so even if a mutation caused a tail to grow, it's ...
B It's known that most animals have tails(尾巴). But why don't humans have them?Well, millions of years ago, humans did have tails, but we slowly lost them. However, a team has built a robotic(机器人的) tail for old people to help them keep their balance (平衡)The tail is one...
Tails: Have you ever noticed that most animals have tails of one kind or another? Humans no longer have tails, although we have a tail bone, so we had a tail at some point in our evolution. Since we don't have tails we tend to think they're not very important, but animals actually...