Why are fats useful and sometimes better than carbohydrates

Fats contain more than twice chemical energy as proteins and carbohydrates have. So sometimes fats are very important than carbohydrates or some other biomolecules.

As compared to carbohydrate and proteins fats has more than twice a calories per gram. A gram of fats has 9 calories. A gram of carbohydrate and proteins has about 4 calorie. Therefore,fats useful and sometimes better than carbohydrates.

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.