大象的嗅觉动物界最灵敏 Researchers have discovered that African Elephants have the largest number of genes dedicated to smell of any mammal. 研究人员发现,非洲大象拥有数量最多的基因,这些基因有利于所有哺乳动物的嗅觉。 Given the size of their trunks, and how important it is to their survival, it is probably unsurprising that an elephant s nose is not only the longest in the animal kingdom, but also the most effective. In comparison, humans and other primates have a poor sense of smell. The functions of these genes are not well known, but they are likely important for the living environment of African elephants, said author Dr Yoshihito Niimura of the University of Tokyo. Apparently, an elephant s nose is not only long but also superior. The sense of smell is critical to all mammals, and they use it for sniffing out food, avoiding predators, finding mates and locating their offspring. In a study published in Genome Research, scientists examined the 13 mammal species and found that African Elephants have twice the number of smell genes as dogs and five times more than humans. They have around 2,000 genes alone that are dedicated to scent. Humans in comparison have just under 400 and other primates like chimpanzees, even less. The study found that 20,000 genes are responsible for the sense of smell in mammals, of which around half are functional, but the collections differ for each species. Horses have around 1,000 smell genes, rabbits around 750 and rats about 1,200. The large repertoire of elephant genes might be attributed to elephants heavy reliance on scent in various contexts, including foraging, social communication, and reproduction, added Dr Niimura
儿童绘本故事在线阅读:梦想收藏家
儿童绘本故事在线阅读:牛的缰绳
儿童绘本故事在线阅读
让孩子在游戏中学会说英语
90本牛津英语阅读树绘本PDF(一)11
儿童绘本故事在线阅读:在夜晚
儿童绘本故事在线阅读:新衣服
儿童绘本故事在线阅读:猜猜我是谁
90本牛津英语阅读树绘本PDF(一)10
儿童绘本故事在线阅读:体检
英语早教什么时候开始?怎样是正确的双语教育?
如何做好英语亲子阅读?
儿童绘本故事ppt:小丑学校
少儿绘本故事书推荐:球类打架的日子
90本牛津英语阅读树绘本PDF(一)01
十大最受欢迎的萝莉英语名
儿童绘本故事在线阅读:这个感觉怎么样?
少儿绘本故事书推荐:猫和玉米
少儿英语学习有哪些常见问题?
90本牛津英语阅读树绘本PDF(一)06
儿童绘本故事在线阅读:像爸爸一样
儿童绘本故事ppt:我的朋友,大象
少儿绘本故事书推荐:新衣服
儿童绘本故事在线阅读:在植树节
90本牛津英语阅读树绘本PDF(一)04
少儿绘本故事书推荐:牛的缰绳
儿童绘本故事ppt
少儿绘本故事书推荐:在植树节
少儿绘本故事书推荐:我的朋友,大象
儿童绘本故事ppt:这个感觉怎么样?
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |