Which orgnaisms transform nitrogen to a form that is useful to plants

Nitrogen-fixing bacteria are prokaryotic microorganisms that are capable of transforming nitrogen gas from the atmosphere into “fixed nitrogen” compounds, such as ammonia, that are usable by plants.

Explanation:

Nitrogen fixing bacteria

Explanation:

Atmospheric nitrogen is in the form of

N

2

. This molecule is exceptionally stable and unable to be used by plants. The Lewis dot structure of

N

2

is

: N :::N:

The triple bond between the two nitrogens is very strong. However nitrogen fixing bacteria can attach to the the unused paired electrons on the outside of the nitrogen molecule. The bacteria use the energy from the broken bond for life functions and produce Nitrates and Nitrites as by products. Nitrates (

N

O

3

) and nitrites (

N

O

2

) can be used by plants for nutrition.

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.

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