Tác nhân đột biến làm cho hai bazơ Timin trên cùng mạch liên kết với nhau gây ra đột biến gen là?

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Read the passage carefully and choose the correct answers
  Today's cars are smaller, safer, cleaner, and more economical than their predecessors, but the car of the future will be far more pollution-free than those on the road today. Several new types of automobile engines have already been developed that run on alternative sources of power, such as electricity, compressed natural gas, methanol, steam, hydrogen, and propane. Electricity, however, is the only zero-emission option presently available.
  Although electric vehicles will not be truly practical until a powerful, compact battery or other dependable source of current is available, transportation experts foresee a new assortment of electric vehicles entering everyday life: shorter-range commuter electric cars, three-wheeled neighborhood cars, electric delivery vans, bikes, and trolleys.
  As automakers work to develop practical electrical vehicles, urban planners and utility engineers are focusing on infrastructure systems to support and make the best use of the new cars. Public charging facilities will need to be as common as today's gas stations. Public parking spots on the street or in commercial lots will need to be equipped with devices that allow drivers to charge their batteries while they stop, dine, or attend a concert. To encourage the use of electric vehicles, the most convenient parking in transportation centers might be reserved for electric cars.
  Planners foresee electric shuttle buses, trains, buses, and neighborhood vehicles all meeting at transit centers that would have facilities for charging and renting. Commuters will be able to rent a variety of electric cars to suit their needs: light trucks, one-person three-wheelers, small cars, or electric/gasoline hybrid cars for longer trips, which will no doubt take place on automated freeways capable of handling five times the number of vehicles that can be carried by a freeway today.
  Question. In the second paragraph the author implies that ______
  
• Một lò xo có chiều dài tự nhiên 23 cm và có độ cứng 75 N/m. Đặt lò xo trên mặt phẳng nghiêng α = 300,   đầu dưới của lò xo gắn cố định, đầu trên gắn vật nhỏ nặng 0,9 kg. Lấy g = 10 m/s2. Bỏ qua ma sát. Chiều dài của lò xo khi hệ ở trạng thái cân bằng là

• At no time___________ greater opportunities.

• Để phân biệt với Cám thì các đức tính: Hiền lành, tốt bụng, chăm chỉ được gọi là gì?

• Trong các yếu tố cấu thành tư liệu lao động thì yếu tố nào là quan trọng nhất?
  
• Yêu nước là phẩm chất đạo đức quan trọng nhất của công dân đối với
  
•  Dựa vào hình 8. 10 SGK, trang 73. Cừu được nuôi chủ yếu ở
  

• 'I've got some problems with my phone bill. Can I see someone about it?’ ‘Yes, go to_______ fifth floor. _______ lift is along the corridor. '

• Read the passage carefully and choose the correct answers
  Today's cars are smaller, safer, cleaner, and more economical than their predecessors, but the car of the future will be far more pollution-free than those on the road today. Several new types of automobile engines have already been developed that run on alternative sources of power, such as electricity, compressed natural gas, methanol, steam, hydrogen, and propane. Electricity, however, is the only zero-emission option presently available.
  Although electric vehicles will not be truly practical until a powerful, compact battery or other dependable source of current is available, transportation experts foresee a new assortment of electric vehicles entering everyday life: shorter-range commuter electric cars, three-wheeled neighborhood cars, electric delivery vans, bikes, and trolleys.
  As automakers work to develop practical electrical vehicles, urban planners and utility engineers are focusing on infrastructure systems to support and make the best use of the new cars. Public charging facilities will need to be as common as today's gas stations. Public parking spots on the street or in commercial lots will need to be equipped with devices that allow drivers to charge their batteries while they stop, dine, or attend a concert. To encourage the use of electric vehicles, the most convenient parking in transportation centers might be reserved for electric cars.
  Planners foresee electric shuttle buses, trains, buses, and neighborhood vehicles all meeting at transit centers that would have facilities for charging and renting. Commuters will be able to rent a variety of electric cars to suit their needs: light trucks, one-person three-wheelers, small cars, or electric/gasoline hybrid cars for longer trips, which will no doubt take place on automated freeways capable of handling five times the number of vehicles that can be carried by a freeway today.
  Question. According to the passage, public parking lots of the future will be ______
  

• Cho hàm số . Tìm tất cả các giá trị của tham số thực để hàm số có cực đại, cực tiểu và các điểm cực trị của đồ thị hàm số lập thành tam giác có diện tích lớn nhất