The sum of all Earth's ecosystem is called the ----------

Options :
  1. stratosphere
  2. lithosphere
  3. biosphere
  4. hydrosphere

Answer and Explanation :-

Answer: Option 3


Sorry there is no explanation for this answer. Please help others by posting your response below

How do you rate this queston?  Very Easy  Easy  Average  Above Average  Tough

Previous Question : Permafrost is characteristic of the

Next Question : Among the following gases, which is the one that is lighter than air?

Click here for free online test on General Science


 (Getemail alerts when others member replies)

Life is 0 percent what happens to you and ninety percent how you respond to it.
-Lou Holtz