Question 1: How long does it take for silkworms to molt once? The life of a silkworm:

First, the silkworm egg stage: the silkworm eggs grow very small, and the newly born silkworm eggs are pale yellow and slightly oval.

Incubation period: After about a week, the eggs hatch into larvae, covered with black hair and shaped like ants, so they are called "ant silkworms".

3. Adult stage: Silkworms molt once every seven days, and once molted, they are called second instar; Peeling twice is called third age, peeling three times is called fourth age, peeling four times is called fifth age, and then pupae are formed. The first and second instar silkworms are called "young silkworms", and the silkworms after the third instar are called "strong silkworms".

Fourth, the silking stage: after four times of peeling, the silkworm will turn yellow and transparent, and the skin will be tight. It doesn't like mulberry leaves, which means it is ready to cocoon and spin silk. When silkworms spin silk, they will first fix the position of the cocoon, then surround themselves and spin the silk into a figure-eight cocoon.

5. emergence period: after silkworms spin silk and form cocoons, they will molt in the cocoons. After about 10- 15 days, the pupae will shed their pupa shells and emerge into moths.

6. Mating and spawning period: The purpose of silkworm growing into "adult ~ silkworm moth" is to breed the next generation. There is a yellow sachet at the tail of the female moth, which protrudes from the body when it expands, giving off a smell to lure the male moth to flap its wings to find a mate. After mating, the male moth died soon and the female moth continued to lay eggs.

Female moths don't rest when laying eggs. They can lay about 500 eggs in a day or two and die soon after laying eggs.

Question 2: Why do silkworms shed their skin? In the process of silkworm growth and development, the epidermis cannot grow up with the body. Silkworms shed their skin when their physical growth is restricted. Silkworm eggs are changed from silkworm eggs, less than half the size of sesame seeds. When it first came down, it was milky yellow, like a small ball and a small meat pie. After a long period of gestation, silkworm eggs turned gray, and after a while, they magically turned black. Under the magnifying glass, you can see the young silkworm bending in the eggshell. The clever silkworm can't wait until the end of spring and the beginning of summer to bite through the eggshell with its small mouth, explore its own little brain and want to get out of the hole. The newly hatched silkworm is very small, as black as an ant, and the silkworm raiser vividly calls it "ant silkworm". Silkworm has the characteristics of insects, its body is covered with fine villi, and it has fourteen feet (head six, body eight). Many feet can be firmly attached to objects, which provides great convenience for her to feed. As time goes by, ants and silkworms grow up day by day. But the skin of silkworms, like the clothes we wore when we were young, can't grow up with our bodies, so we adopted the method of changing the skin to solve the problem when we grew up. Silkworms shed their skins four times in their lifetime. About two weeks after birth, silkworms begin to shed their skin for the first time, which may be the cause of "pain". Silkworm peeling is meticulous and skillful. I used to time my watch, and the whole process was only seven or eight minutes. This is a wonderful process. Careful observation will show that the silkworm has not eaten for a long time before shelling and stretched its head lazily. Although it is constantly excreting, its body becomes loose and thin, and its appearance looks like an old man's wrinkled skin. At first, the silkworm split a hole from the top of its head and its head shell fell off. But it is not easy to take off your coat. Silkworm has a good idea. She fixed her body with her tail, moved her body forward a little, and pulled her skin back with her tail. In this way, the silkworm finally took off his coat. After the silkworm is peeled twice, the body color will gradually turn white, the fluff on the body will degenerate accordingly, and obvious links will appear on the body. After peeling for the third time, a small thorn cone grew in the sky at the tail, and the body became crystal clear. At this time, you can see the silk tube in the silkworm. Silkworms mainly feed on mulberry leaves. The ancestors of silkworms really understood the scientific truth. Thousands of plants in the world have chosen mulberry leaves. In fact, this is not surprising. You might as well pick a mulberry leaf, tear it open by hand or rub it, and you will find that it is full of milky juice. My biology teacher told me that this juice contains a lot of protein. Silkworms eat mulberry leaves and absorb rich nutrition, which can not only grow sturdily day by day, but also provide enough nutrition for silk making in the future. Silkworm is a rather smelly animal. She is very greedy, never knows how to save, and keeps eating from morning till night. Silkworm pursues fullness, and it is more appropriate to describe her as a lady of the Tang Dynasty before cocoon formation. Silkworms are also very particular about eating mulberry leaves. Silkworms "cut" food bit by bit along the leaves with their mouths, leaving traces that are very regular, like sawtooth. The feeding process of silkworms has long been called "nibbling" by the ancients and interpreted as "gradual invasion" in Xinhua Dictionary. In fact, there is a big reason why silkworms eat like this, which is determined by the special structure of their mouths. If you look closely at silkworms, you will find that their mouths are divided into two halves. When they chew, the two petals of their mouths are like a pair of scissors, and they can only "cut food" along the mulberry leaves. After more than two months, the life of silkworms reached a climax, and they wanted to create miracles. First, she wants to build a beautiful house for herself. Do not underestimate them. Silkworm is a natural craftsman with a unique set of architectural stunts. They first carefully searched for a corner, and then used their building material-silk. She fixed her body with her tail, pointed her mouth at the selected position, spit out silk to fix one end, twisted her body in situ, and spit out silk with her mouth to fix the other end. Just out of the belly, silk sticks like all-purpose glue, and every silk sticks firmly. Usually, silkworms have to build a rectangular frame, and then constantly add silk to encrypt it. Within a few hours, the silkworm forms an oval cocoon on the rectangular frame. Silkworms cocoon from the outside to the inside. At the beginning, you will see the silkworm's body curled up in the cocoon, regularly filling silk, and slowly thickening the cocoon, blocking your view like a curtain, but your ears are close to the cocoon, and you can still hear the "squeaking" sound of silkworm spinning to build a house. Think about it, how persistent and hardworking silkworms are. In less than a day, this flawless cocoon with white walls was built. Why do silkworms cocoon into ellipses? I know from my math teacher that the area of a round body is the least used for the same volume. You must be as surprised at the cleverness of silkworms as I am! Can ...>

Question 3: How do silkworms molt? What happens after molting? Silkworms can shed their skin after about a day's sleep. When molting, they can start from scratch. When they molt, they will stretch their bodies and climb out of the old silkworm skin a little. After molting, their skin color will become whiter, their heads will become bigger, their skin will become loose, and they will not feel tight before going to bed.

Hope to adopt

Question 4: It doesn't matter why silkworms molt. My family also raises silkworms. Your silkworm is male and grows slowly. Don't worry, it will be fine. I promise!

Question 5: How many days does it take for a silkworm baby to molt? Silkworms molt once every seven days. Once molted, they are called second instars. Peeling twice is called third age, peeling three times is called fourth age, peeling four times is called fifth age, and then pupae are formed. The first and second instar silkworms are called "young silkworms", and the silkworms after the third instar are called "strong silkworms".

Question 6: How many times does a silkworm molt in its life? Silkworms feed on mulberry leaves. After eating mulberry leaves continuously, its body turned white and began to peel off after a while. It takes about a day to peel, and it's like sleeping without eating. This is called "hibernation". Once skinned, it is the second instar larva. Even if it is peeled once, it will increase by one year, and the larvae will be peeled four times to become fifth instar larvae. After eating mulberries for about 8 days, they will become mature silkworms and start spinning cocoons. It takes two days and two nights for the fifth instar larvae to cocoon, and the silk used for cocoon can actually be colored silkworm.

Draw to the length of 1.5 km! The silkworm peeled its cocoon for the last time and became a pupa. After about 10 days, they come out of the cocoon in the form of silkworm moths. After cocoon emergence, the female moth smells from the tail to lure the male moth to mate, and the male moth dies after mating. A female moth can lay about 500 eggs a night and then die slowly.

So it should be four times.

If satisfied, please adopt it in time.

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Question 7: Where do silkworms molt? be

Silkworms look up and can't eat, which is called "sleeping".

At first glance, it seems that two silkworms are connected together.

After molting for the first time, silkworms "sleep" every six or seven days. Every time they molt, their food intake will gradually increase and their bodies will gradually become bigger. Silkworms have to sleep four times in their lives.