Trong chăn nuôi, tiến hành phép lai giữa lừa và ngựa sinh ra con la. Con la trưởng thành có sức khỏe bình thường song không có khả năng sinh sản. Đây là biểu hiện của hiện tượng:  

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Choose the best answer for the following sentence:

  Mai: “Did you revise our Geography lessons?”

  Tuan: “No, I ____________ it.”
  
  

• Choose the best answer for the following sentence:

  Can you tell me ___________ ?
  
  

• Choose the best answer for the following sentence:

  After 6 years studying at Hanoi Medical University, she _________ a flying colors degree.
  
  

• Choose the best answer for the following sentence:

  Ly: “I’m very happy to have a talk to you today.”

  Thao: “_______________ ”
  
  

• Choose the best answer for the following sentence:

  The greatest English scientist Issac Newton, _________ theory of gravitation is well-known throughout the world, was bom in Woolthorpe village, Cambridge, Britain.
  
  

• Choose the word that has the underlined part pronounced differently from the rest:  

  many                   humanitarian                       friend                       weather

• Choose a word that has different stress pattern:

  interrupt                   international                       information                       intelligent

• Choose the best answer for the following sentence:

  I and my close friend are not in the same school now but we write ___________ regularly.
  
  

• Choose the best answer for the following sentence:

  _____________ money for her further study, she spent all her summer holiday to do a
  part-time job.
  
  

• Choose the best answer for the following sentence:

  Long: “Three new hotels _____________ in our city so far.”

  Thai: “What a good new!”