Trong các đặc trưng sau, có bao nhiêu đặc trưng của quần xã sinh vật?

(1) Mật độ cá thể.                                (2) Loài ưu thế

(3) Loài đặc trưng                                (4) Nhóm tuổi  

Chia sẻ

Một số câu hỏi khác có thể bạn quan tâm.

• Choose a word that has different stress pattern:

  dissolve                      guideline                           reform                           expand

• Choose a word that has different stress pattern:

  reaffirm                        illegal                            substantial                          commitment

• Choose a word that has different stress pattern:

  administrative                     agricultural                     undergraduate                      disadvantages

• Choose a word that has different stress pattern:

  reasonable                   irrigation                     population                        introduction

• Choose a word that has different stress pattern:

  discourage                     pesticide                     insurance                       equipment

• Choose the best answer for the following sentence:

  The country experienced prosperity during the Kennedy _____________.
   

• Choose the best answer for the following sentence:

  The company is holding a competition which encourages its employees to think of the best ways to increase its _______________.

• Choose the best answer for the following sentence:

  There was a traffic jam on my way to work this morning as the main road was under ______________ .
   

• Choose the best answer for the following sentence:

  Farmers in this region always have good crops thanks to the ______________ land.
   

• Choose the best answer for the following sentence:

  During the flood, people had to live in misery due to the _____________ of food and medicine.