Question

1) Most of the organisms can not use...

in free state.

A)oxygen B)nitrogen C)carbon​

Answer 1

Answer:

nitrogen

Explanation:

Organisms including plants and animals cannot use nitrogen in free state.

There are certain nitrogen fixing bacteria such as rhizobium which are found in roots of leguminous plants and fix atmospheric nitrogen.

Answer 2

Explanation:

I think it will be option no. b NITROGEN

I'AM NOT SURE