QUES 1) in what sphere do chemicals have the shortest average residence time?

A) biosphere. B) lithosphere. C) hydrosphere. D) atmosphere. ____________
___
QUES 2) there are 4000 units of energy available to grass at the 1st trophic level of an ecosystem. If the grass is eaten by a mouse & the mouse is eaten by an owl, how many units of energy will be left for the bobcat that eventually eats the owl?

A). 4. B) 40. C) 400. D) 2000

Question

QUES 1)  in what sphere do chemicals have the shortest average residence time?    

 A) biosphere.    B) lithosphere.    C) hydrosphere.    D) atmosphere.                    ____________
___ 
QUES 2) there are 4000 units of energy available to grass at the 1st trophic level of an ecosystem. If the grass is eaten by a mouse & the mouse is eaten by an owl, how many units of energy will be left for the bobcat that eventually eats the owl?

A). 4.       B) 40.       C) 400.      D) 2000

anonymous · Answer

Help

anonymous · Answer

Help! I need  help with this 2.