墨西哥跳豆為什麼會自己跳

❶ 墨西哥跳豆是怎麼回事的呢

豆本身根本不會彈跳，都是里頭飛蛾的蛹在作怪。由於跳豆飛蛾並不屬於本區域的昆蟲，農糧局擔心引進我國的跳豆里的蛹會化成飛蛾，影響我國和周圍國家的生態平衡。香港和日本也基於同樣原因，禁止跳豆入口。

這些小豆子其實是盛產在中美洲一帶的Sebastiana Pavoniana矮灌木的種子。每逢春季，跳豆飛蛾便會在這類矮灌木的花朵上產卵。幼蟲孵化後，鑽進種子莢膜里，吃光果實、在里頭蛹化。

每個莢膜里有三瓣心皮，但未必每一瓣心皮都會有蛹寄居。下過第一場春雨後，莢膜里的心皮就會被拋離樹身。里頭的蛹便能自由彈跳，也就成了俗稱的墨西哥跳豆。

大概四五個月，幼蟲便能長大成為跳豆飛蛾，然後重復進行繁殖後代的過程。

❷ 墨西哥跳豆英文介紹謝謝了，大神幫忙啊

Mexican jumping bean From Wikipedia, the free encyclopedia (Redirected from Mexican jumping beans) Jump to: navigation, search A Mexican jumping bean is a phenomenon native to Mexico, where it is known as a brincador ("hopper"). Physically, Mexican jumping beans resemble small tan to brown beans. They are a type of seed in which the egg of a small moth has been laid. It is the moth's larva which makes them "jump". The beans themselves are from a shrub of the genus Sebastiania (S. palmeri or S. pavoniana), itself often referred to as the jumping bean, while the moth is a member of the genus Cydia, called a jumping bean moth. Contents [hide] 1 Life cycle 2 Playing with/testing the beans 3 Maintenance — "watering" and storage of the beans 4 Source of the beans 5 Jumping beans in popular culture 6 References 7 See also 8 External links [edit] Life cycle Five Mexican jumping beans Recording of a Mexican jumping bean in motion. Bean showing the "trap door" and discarded pupal casing After the egg hatches, the larva eats away the inside of the bean, making a hollow for itself. It attaches itself to the bean with many silk threads. The larva may live for months inside the bean with varying periods of dormancy. If the larva has adequate conditions of moisture and temperature, it will live long enough to go into a pupal stage. Normally, in the spring, the moth will force its way out of the bean through a round "trap door", leaving behind the pupal casing. The small, silver and gray-colored moth will live for only a few days. The larvae jump as a survival measure in order to protect themselves from the heat, which can cause them to dry out. The ultraviolet rays from the sun stimulate them to jump, even in cool temperatures, but leaving the beans in the sun for extended periods will dehydrate and kill them. [edit] Playing with/testing the beans Jumping beans are still widely available for sale in the United States (see links below). In the UK they were a common novelty item in the 1970s. They are a popular scientific and classroom project even now.[citation needed] When the bean is abruptly warmed, for instance by being held in the palm of the hand, the larva twitches and spasms, pulling on the threads and causing the characteristic hop. "Jump" is often an exaggeration, but the beans do noticeably move around. The beans should become active if one holds them in the hand (out of the box) for a few minutes. The beans should also appear to be a very slight shade of green on the side (as shown in the bean in the top picture, on the right). If the bean starts to turn brown (top picture, bean on the left), that indicates it is dying. If one shakes a bean near one's ear and hears a rattle inside, the larva inside has died. A plastic toy under this name was manufactured and sold in packages containing several devices in the 1960s. It resembled a "time release" capsule and had a metal ball inside. When the surface on which the capsule was laid was tilted, the ball would roll to the other end and make the capsule twitch. [edit] Maintenance — "watering" and storage of the beans To rehydrate the beans, they need to be soaked not submerged for a three-hour period in chlorine-free water once or twice a month. The chlorine found in tap water in some locales will kill them. Alternatively, one may let chlorinated tap water stand in an uncovered glass for about six hours before using, to let the chlorine dissipate. Just spraying the beans with a little water is ineffective in maintaining the larvae's lifespan.[1] Beans should be stored in a cool dry place, but freezing will kill them. [edit] Source of the beans The Mexican jumping bean (Laspeyresia Saltitans) comes from the mountains in the states of Sonora, Sinaloa, and Chihuahua; indeed, lamos, Sonora styles itself the "Jumping Bean Capital of the World". They can be found in an area approximately 30 by 100 miles where the Sebastiana pavoniana host tree grows. During the spring, moths emerge from last year's beans and deposit their eggs on the flower of the host tree. [edit] Jumping beans in popular culture Jumping beans were used as a recurring gag in many cartoons from the 1930s to the 1950s, wherein eating the beans would cause a character's whole body to bounce out of control and land on something painful.[2]

❸ 有趣的豆子成群結隊跳個不停，墨西哥跳豆為什麼會跳動

有趣的豆子成群結隊跳個不停，墨西哥跳豆之所以會跳動，並不是由於豆子本身，而是由於這種豆子里含有蟲子，跳豆之所以會跳跟這個蟲子有很大的關系。

有趣的豆子成群結隊跳個不停，你知道墨西哥跳豆為什麼會跳動？歡迎留言討論。

❹ 在美國找到了一種會動的種子，懂得厲害的時候簡直會跳起來。請問高手是什麼種子呢原理是什麼

核桃

❺ 墨西哥跳豆的原因

豆本身根本不會彈跳，都是里頭飛蛾的幼蟲在作怪。幼蟲很大，蟲的後腿抓住豆子內壁，然後迅速的向上躬身，豆子就跳起來了。房間越暖和，它跳得越歡。有人問怎麼蟲子會進豆子里呢？原來每逢春季，跳豆飛蛾便會在這類矮灌木的花朵上產卵。幼蟲孵化後，鑽進種子莢膜里，吃光果實，在里頭蛹化。

❻ 墨西哥跳豆是怎麼回事

豆本身根本不會彈跳，都是里頭飛蛾的幼蟲在作怪。幼蟲很大，蟲的後腿抓住豆子內壁，然後迅速的向上躬身，豆子就跳起來了；房間越暖和，它跳得越歡。有人問怎麼蟲子會進豆子里呢？原來每逢春季，跳豆飛蛾便會在這類矮灌木的花朵上產卵。幼蟲孵化後，鑽進種子莢膜里，吃光果實、在里頭蛹化。
由於跳豆飛蛾並不屬於我國的昆蟲，農糧局擔心引進我國的跳豆里的蛹會化成飛蛾，影響我國和周圍國家的生態平衡。很多國家也基於同樣原因，禁止跳豆入口。
這些小豆子其實是盛產在中美洲一帶的Sebastiana Pavoniana矮灌木的種子,這個植物屬於大戟科，藏在這些種子里的是一些拉丁文名稱叫做Carpocapsa saltitans的蛾類幼蟲，屬於卷葉蛾科。
不過，跳豆只能跳兩個月。因為蟲子隨後開始吐絲結繭。再過兩個月，蟲子就會化作飛蛾，咬破繭子和跳豆飛出來。
每個莢膜里有三瓣心皮，但未必每一瓣心皮都會有蛹寄居。下過第一場春雨後，莢膜里的心皮就會被拋離樹身。里頭的蛹便能自由彈跳，也就成了俗稱的墨西哥跳豆。
大概四五個月，幼蟲便能長大成為跳豆飛蛾，然後重復進行繁殖後代的過程~~

❼ 墨西哥跳豆為什麼會一直跳

墨西哥跳豆是一種墨西哥灌木的種子，尤指歐洲大戟科（大戟科）灌木的種子，內部含有一種小油蛾的幼蟲。取食於種子內部果肉的幼蟲的運動由於溫度的增加而增強，從而使種子進行跳躍的運動。

所以實際上，使這些豆子跳躍的是一種生活在豆子里的小油蛾幼蟲。油蛾在植物的花里產卵，這些卵被並入種子中。然後幼蟲吃掉豆子的內部並生活在那裡。當幼蟲移動時，豆子也會移動。最終，幼蟲變成油蛾，從豆子里出來，重復這個循環。因此，我們看到的墨西哥跳豆的內部其實自產生之時已經被掏空了，取而代之的是油蛾幼蟲。與其說是墨西哥跳豆在跳，不如說是披著墨西哥跳豆外皮的油蛾幼蟲在跳。