Why can t the little girl eat the new variety of artichoke?

Potatoes, also known as potatoes, contain 9-20 starch, protein, fat, and crude fiber, and it can be seen that the crude fiber content in potatoes is the lowest and the starch content is the highest. Therefore, potatoes are not a food based on crude fiber.

The crude fiber food refers to the food containing more than 2 grams of crude fiber per 100 grams of food, the main consumer groups of this type of food are adults and the elderly, and when eating, it should also be based on the recommended intake of crude fiber in nutrition, 20-35 grams per person per day, eating more will reduce the utilization rate of other nutrients.

Potatoes are not a crude fiber food. Crude fiber food refers to food that contains more than 2 grams of crude fiber per 100 grams of food, and the crude fiber content in potatoes is only, that is, only one gram of crude fiber per 100 grams of potatoes, which is far lower than the standard of 2 grams, so potatoes are not crude fiber foods. Potatoes are the third most important food crop in the world, along with wheat, maize, rice and sorghum, and become the world's top five crops.

Common crude fiber foods mainly include grains, vegetables, fruits, legumes, etc. Most of the crude fiber foods on the market are added to coarse grains and coarse grains containing insoluble dietary fiber, such as corn, wheat bran, rice bran, etc. Crude fiber has less nutrients and is not easy to digest, but it can play a certain role in the prevention and improvement of obesity, hyperlipidemia, diabetes and other diseases.

Potatoes are not a crude fiber food. Greens, celery, unmilled whole wheat, these are crude fibers Teach you, the things that are hard to chew are generally crude fibers......

Because it is not difficult to cross potatoes between related species, and tubers can be used for vegetative propagation to keep the transmissibility stable, the potato varieties are actually hybrids. Since the 20th century, due to the widespread use of wild species (e.g., 2n = 6x = 72; 2n=4x=48, etc.), and the new varieties cultivated are mostly hybrids. Potatoes are divided into white-skinned, yellow-skinned, red-skinned and purple-skinned varieties according to skin color; According to the color of the tuber, it is divided into yellow meat and white meat; According to the shape, it is divided into round, oval, long barrel and oval varieties.

In cultivation, it is often divided into three types: early maturity, medium maturity and late maturity according to the tuber maturity period, and the number of days from seedling emergence to tuber maturity is 50-70 days, 80-90 days and more than 100 days respectively. According to the length of the dormancy period of the tuber, it can be divided into three types: no dormancy period, short dormancy period (about one month) and long dormancy period (more than three months). Before the 60s of the 20th century, the old farm varieties were seriously degraded due to viral diseases, and were gradually replaced by newly introduced and newly bred varieties.

The main excellent varieties are: early-maturing varieties Fengshou Bai, Kexin No. 4, Zhengshu No. 2, Pulsatilla, etc.; medium-ripening varieties Kexin 1, Mira, Wumeng 601, Epoka, etc.; Late-maturing varieties Shaza 15, Kexin 3, Gaoyuan 4, Hutou and so on. The early-maturing varieties were mainly distributed in the middle and lower reaches of the Yangtze River and the North China Plain, while the mid- and late-maturing varieties were mainly distributed in the northeastern, northwest and southwestern mountainous areas.

In front of the booth of the Zhangjiakou Bashang Agricultural Science Institute, more than ten kinds of potato samples were lined up: slender and slender.

Thick, round, square, yellow, red, green, brown, used for french fries, fried potatoes.

It is used for tablets, ordinary dishes, and starch processing, and ......If you look closely, you can see that these cute little things are still there.

His own names, such as Jizhangshu No. 4, "2191", Bashu No. 10, Atlantic Hybrid, etc., are mostly based on.

Characteristics and ancestral genealogies are named.

Some of the new varieties displayed at the agricultural fair show that our province has a history of eating potatoes from other places.

will end. The Provincial Academy of Agricultural Sciences brought new varieties of detoxified early-maturing potatoes, such as "early rhubarb", "early white".

Zheng Shu No. 5", etc., can be sown when the soil thaws before and after the sting, and the yield per mu is as high as about 2,000 kilograms, the highest one.

It can reach more than 3000 kilograms, and the benefit per mu is 1000-1500 yuan. After harvesting before and after the wheat harvest, jade can also be planted in the next stubble.

Crops such as rice, peanuts, and green onions.

(5 points) (1) It is beneficial to maintain the excellent traits of the parents (2) Tissue culture (3) The genetic material (gene) of yy has been changed yy or yy

1) Transplanting genes that control the synthesis of certain beef proteins into potatoes exhibits the characteristics of being rich in beef protein, which belongs to transgenic technology

2) White matter is a bio-organic macromolecule, which needs to be decomposed into amino acids under the catalysis of digestive enzymes before it can be absorbed: the small intestine is the main absorption organ, and there are a large number of annular folds on the inner wall of the small intestine; There are many villous protrusions on the folds; The villi of the small intestine are thin and consist of only one layer of epithelial cells: the villi are rich in capillaries that are suitable for nutrient absorption

3) The variable of No. 1 and No. 3 is temperature, so the best thing to sell is the effect of temperature on the growth and development of potatoes The potatoes in the No. 5 pot are flooded with water because of a large amount of watering, and the potatoes are unable to breathe due to lack of oxygen, resulting in death Only one potato was used in each group of experiments, and there was a great deal of chance and a large experimental error

4) In the inheritance process of a pair of relative traits, the offspring individuals have traits that the parents do not have, then the traits expressed by the parents are dominant traits, and the new traits must be recessive traits, controlled by a pair of recessive genes Usually uppercase English letters are used to indicate dominant genes, and lowercase English letters are used to indicate recessive genes Therefore, if two yellow-fleshed potatoes are crossed, the offspring generation appears white-fleshed individuals, indicating that white-fleshed individuals are recessive traits, gene composition is AA, and the genome of the parents is AA The transmission of genes and traits between the parents and offspring is shown in the figure

Therefore, the answer is: (1) genetically modified technology (genetic engineering).

2) Amino acids There are a large number of annular folds in the inner wall of the small intestine; There are many villous protrusions on the folds; The villi of the small intestine are thin and consist of only one layer of epithelial cells: the villi are rich in capillaries.

3) Temperature Hypoxia makes respiration impossible, and if only one material is provided under each condition, it is easy for other factors to affect the experimental results.

Because wheat is homozygous, it is necessary to select individuals whose genotype is AABB, indicating that the existing wheat plants are AABB and AABB, and if there are individuals with AABB, it is necessary to cross to make their excellent genes integrate.

p aabb x aabb

f1 aabb

Self-inbred f2 a b a bb aab aabb

Choose option 2: Or collect a large number of F2 dwarf disease-resistant plant seeds and put the offspring of each plant.

Successive inbred multiple generations are separated, spotted, and the plants that grow without trait separation are homozygous, and later.

AABB generation can be used.

The potato variety is a heterogeneous body, and now we have to select the individual with the genotype Y rr, (you typed br above is wrong), indicating that there are now yyrr and yyrr individuals in nature.

p yyrr x yyrr

f1 yyrr yyrr yyrr yyrr

I elect direct use.

1) Gene control traits, a certain gene of an organism is transferred to the genome of another organism by biotechnology, and the genetically modified organisms cultivated are likely to show the traits controlled by the transferred genes, this technology is called transgenic technology Researchers will control a gene that controls the synthesis of beef protein into the cells of the potato, and the potato appears rich in beef protein, which greatly increases the nutritional value of the potato. Therefore, the core biotechnology used to grow these potatoes is the use of genetically modified technology

2) After the scientists destroyed the genes transplanted into the potato cells, the potatoes bred did not contain beef protein, indicating that the traits of the organism are controlled by genes

3) The digestion of protein begins in the stomach, but can only be absorbed by the human body if it is completely broken down into small molecules and water-soluble amino acids in the small intestine The characteristics of the small intestine adapted to its absorption are: the small intestine is very long, about 5-6 meters; There are many folds and villi on the inner surface of the small intestine, which greatly increases the digestion and absorption area of the small intestine; The villi wall of the small intestine is very thin, composed of only one layer of epithelial cells, and there are abundant capillaries and capillary lymphatic vessels in the villi, and the capillaries and capillary lymphatics are also very thin and composed of only one layer of epithelial cells

4) The color of potassium permanganate solution is purple, vitamin C can fade potassium permanganate solution, add the same concentration and same quality of potassium permanganate solution in different test tubes, and then add the fruit juice or vegetable juice to be tested dropwise to fade it, the less it is dropped, the more vitamin C is contained in the fruit juice or vegetable juice, and vice versa

Therefore, the answer is: (1) genetically modified technology (or genetic engineering).

2) Genes control biological traits.

3) amino acids; The small intestine is very long, about 5-6 meters; There are many folds and villi on the inner surface of the small intestine, which greatly increases the digestion and absorption area of the small intestine; The villi of the small intestine are very thin, composed of only one layer of epithelial cells, and the villi are rich in capillaries and capillaries, and the capillaries and capillaries are also very thin and composed of only one layer of epithelial cells.

4) Low (or reduced).