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cho A: thân cao, a:thân thấp; B:lá chẻ, b: lá nguyên; D: có tua, d: không tua. Các cặp gen nằm trên nst thường gen trội là trội hoàn toàn, giảm phân không có hoán vị gen. cho P dị hợp 3 cặp gen lai phân tích, Fa có tỉ lệ 1 cây cao, lá nguyên, không tua; 1 cây thấp, lá chẻ có tua. Kiểu gen của P là
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Since humans can not see and breathe underwater, scuba diving requires several pieces of important equipment. Scuba divers must wear a mask in order to be able to see underwater. The mask creates an air space that protects the eyes and nose. Divers wear scuba fins on their feet to help them move easily and quickly through the water. Many divers also wear a wetsuit in order to stay warm underwater. Scuba diving for fun first became possible with the development of the Aqualung by Jacques Cousteau and Emile Gagnan in the early nineteen forties. In the United States, articles in popular magazines about Cousteau and his underwater exploration methods helped bring attention to scuba diving. Because of the cost of the equipment, diving did not become a widely available sport until years later. There are many beautiful places around the world to dive. Scuba Diving Magazine recently listed several of the "must see" diving sites. These include Bonaire, one of the Netherlands Antilles Islands off the coast of Venezuela. Here, divers can explore many reefs within a protected marine park. Divers can even explore the sea creatures that live in and around the ship, Hilma Hooker. This seventy meter long cargo ship sank over twenty years ago. Scuba diving in any of these places is an extraordinary experience. This popular activity allows people to see an expansive and exciting underwater world in a new way. 1. What/ scuba divers/in order to be able to see underwater? - Question: …………………………………………………….………………………… - Answer: …………..………………………………………….…………………………. …………..………………………………………….……………………………………. 2. Why/ divers/scuba fins? - Question: …………………………………………………….………………………… - Answer: …………..………………………………………….…………………………. …………..………………………………………….……………………………………. 3. When/scuba diving for fun/first become possible? - Question: …………………………………………………….………………………… - Answer: …………..………………………………………….…………………………. …………..………………………………………….……………………………………. 4. Where/divers/explore many reefs within a protected marine park? - Question: …………………………………………………….………………………… - Answer: …………..………………………………………….…………………………. …………..………………………………………….……………………………………. 5. When/Hilma Hooker/sink? - Question: …………………………………………………….………………………… - Answer: …………..………………………………………….…………………………. …………..………………………………………….……………………………………. Giúp mình với cần gấp lắm Mơn mn nhìu

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