Pl help with this question. i need an answer ASAP. Nitrogen fixation for plants occurs in what organisms?​

Two kinds of nitrogen-fixing microorganisms are recognized: free-living nonsymbiotic bacteria, including the cyanobacteria or blue-green algae Anabaena and Nostoc and genera such as Azotobacter, Beijerinckia, and Clostridium; and mutualistic symbiotic bacteria such as Rhizobium, associated with leguminous plants,.

Explanation:

Two kinds of nitrogen-fixing microorganisms are recognized: free-living (nonsymbiotic) bacteria, including the cyanobacteria (or blue-green algae) Anabaena and Nostoc and genera such as Azotobacter, Beijerinckia, and Clostridium; and mutualistic (symbiotic) bacteria such as Rhizobium, associated with leguminous plants, ...

they fuse to form they have half as many chromosomes as a somatic cell of the same individual. b

correct answer: understand the different control methods available

integrated pest management is an strategy that is based on the ecosystem and try to prevent the pest and the damage caused by them by applying combination of technique like habitat manipulation, biological control and use of resistant varieties.

the main aim of the integrated pest management is not to completely eliminate the pest but to strengthen the ecosystem so that conditions are favorable for plants and unfavorable for pests.