Ageneral rule relating the capacity of a specific animal's digestive system to provide adequate access to substrates for biosynthesis of cellular components, as well as fuel molecules needed for atp production, is that the animal should have access to which ?

a diet that matches the "food pyramid" for the species.

Explanation:

The Food Pyramid makes healthy eating (i.e getting the correct amount of nutrients – protein, fat, carbohydrates, vitamins and minerals the body need to maintain good health) easier.

The Food Pyramid can also be a guide to help get the right balance of nutritious foods within the animal calorie limit.

d.

hope to be marked brainliest

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.