Science???

Question

Air is a major contribution to the mass of a plant because the plant removes carbon dioxide from the air.true or false?

Answer 1

true

Answer 2

false. the plant does remove carbon dioxide from the air but it also gives off oxygen. also the mass of air is incredibly small.

Answer 3

While I do applaud you for posting all of your homework in different forums for people to answer for you (rather than listing it all in the same one), my answer is:

Quit cheating and do your own homework.  We're here to help explain things that you don't understand, not to do your work for you.  It's all in your book - go ahead and read it.