1, the skin of kidney bean is explanted, and two cotyledons store nutrients; The hypocotyl and radicle must take root and sprout. 2. The main characteristics of Insecta can be recorded as follows: two pairs of wings and three pairs of feet, and the body is divided into head, chest and abdomen; Each antenna has a pair of compound eyes, and the mouthparts have a characteristic foot. 3. Symptoms of human body lacking VA, VB, VC and VD: night blindness A, beriberi B, poor blood type C, rickets D.4. Symptoms of lack of mineral elements in plants: small nitrogen yellow, small phosphorus purple, brown edge. These interesting learning methods can make students remember deeply in a happy mood. About eight essential amino acids: "tassel shoes, bright, show their true colors, not bad." There are eight essential amino acids hidden here. Can you think of them? About the four bases that make up DNA: "A-strain birds are purines and T-chest cells are pyrimidines." Department =G, thin =C, T-shaped chest: Do you think the sternum on the female star's chest looks like a T-shape? About pigments: "Huang Hu A and B advance, and the colors of orange, yellow, blue and yellow stay. Carotene is the thinnest and chlorophyll a is the most generous. Two yellows and two greens are separated, and the leaves and leaves are holding hands. " The first sentence is about the speed of deployment; The second sentence is about the width of expansion; The third sentence is about the position of expansion. On the molecular structure of DNA "anti-parallel double helix, internal and external alternating cycle, base complementary hydrogen bond." 〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓〓 "Rhym: Treatment should be covered with black paper in the dark, and alcohol should be heated in contrast. Rinse with decolorized water, and add iodine solution to wash away the color change. "Carbon dioxide is an essential raw material for photosynthesis", the operation steps of this inquiry experiment should be coded into rhymes: the treatment should be heated by sodium hydroxide in the dark, the alcohol should be rinsed with decolored water and iodine solution should be added. ArticleID = 6379/jyky 1/show article . ASP？ ArticleID=6379 This is also true, but plagiarism is not allowed. You have to see it yourself. Food is digested in cells, and grass in water is the representative. 2. The coelenterate phylum coelenterate includes hydra and radially symmetric protozoa; Two germ layers constitute the body wall, and the reticular nerve senses stimulation. 3. Flat animals include tapeworms, parasitic pigs and humans. ...