Seek help! Inside the march! Silkworms died suddenly within 3 hours

You can see that this might help.

Acetone is highly volatile, and you dare to put it inside.

Oviparous. That is, silkworms hatch from eggs. Oviparity is characterized by the fact that in embryonic development, it relies entirely on the yolk contained in the egg itself as nutrition. Oviparity is common in animals such as birds, reptiles, fish. Specific such as swallows, turtles, and crucian carp are all oviparous.

Silkworms have male and female, so his autosomes have 27 pairs of sex chromosomes, 1 pair of sex chromosomes, so genetic engineering to detect is 27 + 2 (sex chromosomes) = 29 pairs of chromosomes, called homologous chromosomes, generally sexual reproduction, one from the father, one from the mother, these two can become a pair, because they are structurally similar, so only one of them can be detected.

Answer: 1 2 0

After ggztzt x ggztw mating, the genotypes of F1 are GGZTW and GGZTZT, so the proportion of males with natural green silkworms in F1 is 1 2. , F1 individuals are mating, and the offspring will have 3 4 G and 1 4 GG for G and G genes, and 1 4ZTZT, 1 4ZTZT, 1 4ZTW and 1 4ZTW for the other pair of genes, so the genotype of the male individual with a transparent oily body color and natural green silkworm in F2 is 3 4*0=0.

Insects bar. Insects: Lepidoptera, Bombycidae. It is also known as silkworm, or silkworm.

A silkworm with high economic value. With mulberry leaves as food, cocoons can be reeled silk, mainly used for weaving silk, is an excellent textile raw material, and also has a wide range of uses in military industry, power and other aspects. Silkworm pupae and silkworm manure can also be used comprehensively.

The study of the morphology and physiological habits of mulberry silkworms can provide a scientific basis for the breeding and variety improvement of mulberry silkworms.

Jiangsu and Zhejiang can raise four to five silkworms a year, which are spring silkworms, summer silkworms, and autumn silkworms (divided into two phases). Yunnan, Guangxi and other places can raise silkworms for multiple periods a year.

1. The life of a silkworm.

1.Ovum. The newly laid eggs are pale yellow, flattened and oval, about 1 thick, about 1 in diameter, and the color of the eggs will gradually darken, and the color of the eggs will not change if they are not fertilized.

2.Ant silkworm (first-star silkworm).

The silkworm eggs have just hatched out of the body hairy, black, called ant silkworm or hairy silkworm, about 3mm, the body color gradually turns white after the next day, and molts into the second instar silkworm after about four days.

3.Silkworms from two to five years old.

After the ant silkworm molts, it becomes the second instar silkworm, the body color turns white, and the first instar is increased every time it molts in the future, and the larvae enter the fifth instar silkworm after four molts, and the growth of the body increases every time it molts, especially.

The growth is more pronounced in the fourth and fifth years of age.

4.Silkworm chrysalis. After the silkworm enters the fifth instar, it begins to spin silk and form a cocoon in about seven days, and the silkworm will molt again in the cocoon within about 2 or 3 days, and then turn into a silkworm pupae, the body becomes shorter, fat, and brown, and the silkworm moth can be feathered after about ten days.

5.Silkworm moth. The silkworm moth is an adult of the silkworm, and its body is composed of a head, thorax, and abdomen, with a pair of antennae on the head and a pair of wings on the chest, but it cannot fly because it is not fully developed.

What color is a silkworm?

The color of the silkworm cocoon is different according to the different things eaten by the silkworm, if you eat bamboo shoots, the color of the cocoon will turn green, and if you eat mulberry leaves, the color of the cocoon will be white.

Silkworms are best fed mulberry leaves if they have the conditions, but you can also feed some lettuce leaves, elm leaves, and oak leaves, but they are not as good as mulberry leaves. I tried it, and the silkworms fed with lettuce leaves spit out the cocoons that came out were yellow.

2. Locusts need 5 times.

The life of a locust goes through 3 stages: egg, nymph, and adult. The nymph molts 5 times in its life, and each molt is called"One year old"From the hatching of the fertilized egg into a nymph to the first molt, it is the first instar, and the subsequent molt increases by one instar. After the third instar, the wing buds are prominent.

After the fifth instar, it becomes an adult worm that can fly.

Arthropod.

Because its adult worm is a moth.

Moths belong to the class of arthropods.

Animalia - Arthropoda - Insecta - Butterflies and Moths - Mothidae.

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