Definition & key points of Nitrogen Metabolism Botany 1 Comment TERMS DEFINITIONS Nitrogen fixation The synthesis of organic nitrogenous compounds from atmospheric nitrogen by certain microorganisms is called biological nitrogen fixation. Asym biotic organism The free living nitrogen fixing organisms are called are asymbiotic organisms. Leghaemoglobin The nodule is pink in colour. The pink colour is due to the presence of pigment leghaemoglobin. Similar Articles: Subjective And Short Questions For Nitrogen Metabolism Objective Questions of Nitrogen Metabolism Biological Nitrogen Fixation NITROGEN CYCLE OBJECTIVE FOR ECOSYSTEM Tweet Pin It Home » Botany » Definition & key points of Nitrogen Metabolism Related Posts MERISTEM Type: Funaira occurrence , structure & sexual reproduction OBJECTIVES OF FOR TISSUE AND TISSUE SYSTEM About The Author sana Latest Comments zahid hussain January 15, 2017 this was awesome and worth-reading articles Reply Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment Save my name, email, and website in this browser for the next time I comment.