(i) What are the two ways in which atmospheric nitrogen gets fixed into usable forms?

(ii) How do herbivores obtain nitrogen for their body?

Asked by Topperlearning User | 4th Jun, 2014, 01:23: PM

Expert Answer:

(i)

(a) A few nitrogen fixing bacteria like Rhizobium and certain blue green algae can fix atmospheric nitrogen into usable forms like nitrates and nitrites.

(b) Sometimes nitrogen gets fixed due to the high temperatures and pressures during lightning, thereby creating usable forms of nitrogen.

(ii) Herbivores feed on plant parts and obtain the plant proteins and other nitrogen compounds from them which they use for building nitrogen compounds in their own bodies.

Answered by  | 4th Jun, 2014, 03:23: PM