蚕变成蝴蝶的过程图片,蚕变成蛾的过程...「一定记住」
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1、孵化:刚从卵中孵化出来的蚕,称为蚁蚕,身上长满细毛,约两天后毛即不明显。
2、长大:蚕以桑叶为生,不断吃桑叶后身体变成白色,一段时间后便开始脱皮。蚕在饲养中要蜕皮4次,每次蜕皮的时候不吃不动,每次眠期大概持续一天。
3、吐丝:经过一次脱皮后,就是二龄幼虫。脱一次皮就算增加一岁,共要脱皮四次,成为五龄幼虫才开始吐丝结茧。
4、结茧:一般25天左右开始结茧。需要两天时间才能结成一个完整的茧,并在茧中完成最后一次蜕皮,成为蛹。
5、破茧而出:约十天后,羽化成为蚕蛾,破茧而出。出茧后,雌蛾尾部发出一种气味引诱雄来交尾,交尾后雄即死亡,雌蛾约花一个晚上可产下约500个卵,然后也会慢慢死去。
蚕的生长过程分为卵、幼虫、蛹和成虫四个阶段,刚从卵中孵化出来的蚕宝宝黑黑的,蚕宝宝像蚂蚁被称为蚁蚕,身上长满细毛,约两天后毛即不明显了。蚕宝宝以吃桑叶为生,不断吃桑叶后身体会慢慢变成白色,一段时间后它便开始脱皮。
脱皮大约要一天的时间,如睡眠般的不吃也不动,这叫休眠,经过一次脱皮后,就是二龄幼虫,它脱一次皮就算增加一岁,一共要脱皮四次,成为五龄幼虫才开始吐丝结茧,五岁幼虫需二天二夜的时间,才能结成一个茧,并在茧中进行最后一次脱皮,成为蛹。约十天后,破茧而出,羽化成为蚕蛾。
【英文介绍/For English】:
1. Hatching: The silkworm that has just hatched from the egg, called the ant silkworm, is covered with fine hair, and the hair is not obvious after about two days.
2. Grow up: Silkworms live on mulberry leaves. After eating mulberry leaves, their bodies turn white, and they begin to peel after a period of time. Silkworms shed their skins 4 times during feeding. They do not eat or move each time they shed their skins, and each sleep period lasts about a day.
3. Spinning: After one peeling, it is the second instar larvae. Even if the skin is shed once, it will increase by one year. It takes a total of four times to shed the skin, and the fifth instar larvae begin to spin silk and cocoon.
4. Cocoon formation: Generally, it begins to form cocoons in about 25 days. It takes two days to form a full cocoon, where it molts for the last time and becomes a pupa.
5. Emerge from the cocoon: about ten days later, it emerges into a silk moth and emerges from the cocoon. After emerging from the cocoon, the female moth emits a scent from its tail to lure the male to mate. After mating, the male dies. The female moth can lay about 500 eggs in about one night, and then slowly die.