An organism's response to a particular pollutant will depend on ...

[cnetterville]

An organism's response to a particular pollutant will depend on the ____________ and ____________ of that
  pollutant. Fill in the blank(s) with the appropriate word(s).

Question 2

A(n) ____________ causes damage by interfering directly or indirectly with the mechanical or biochemical processes
  of an organism. Fill in the blank(s) with the appropriate word(s).

[babybsemail]

Answer to Question 1

quantity; toxicity
toxicity; quantity

Answer to Question 2

pollutant

[cnetterville]

Thanks for the timely response, appreciate it

[okolip]

Wow, this really help