Why do cells need energy from food

bc any living organism must take in energy via food, nutrients, or sunlight n order 2 carry out cellular processes.

Explanation: The transport, synthesis, n breakdown of nutrients n molecules n a cell require the use of energy.

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They can't produce their own food and without food they can't reproduce

Explanation:hope this helps

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.