1. If there is not enough carbohydrate intake, how does the body form glucose?

2. If there is a glucose shortage, how does the body produce energy?

1. When there isn't enough readily available glucose from the breakdown of carbohydrate, the body first turns to stored carbohydrate reserves (glycogen). If there's still no new intake of carbohydrate and the reserves are depleted, the body is forced to use alternative sources (fat and protein) for energy.

2. Gluconeogenesis(generation of glucose from certain non-carbohydrate carbon substrates such as lipids) Use lipids(some organs such as the brain can’t use lipids as their energy source and need glucose)

Explanation:

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explanation:

b,bacteria convert nitrates

into nitrogen gas.

d,plants and animals take in

and use nitrogen compounds.

e,bacteria break down waste    

products and return nitrogen  

to the soil.

a,bacteria convert atmospheric

nitrogen to ammonia.

c,bacteria convert ammonia

to nitrites and nitrates.