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What are the structures and functions of DNA

DNA is an abbreviation for deoxyribonucleic acid, which is the genetic material passed from parent to offspring. A gene is a segment of DNA that codes for a trait and is transferred from parent to offspring. DNA consists of chromosomes, and also make up genes. DNA is apart of cell reproduction. DNA is like a set of instructions, telling cells what needs to be done.

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explanation:

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.