Natural selection cannot make an elephant run as fast as a cheetah and fly like a bird. This is an example of: Group of answer choices 1. disequilibrium. 2. genetic drift. 3. physical constraints on natural selection. 4. a correlated response to selection.

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.

silt loam

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