Aforensic odontologist examines the teeth of a skull and finds no baby teeth, no wisdom teeth, scarring in the rear jawbone, no dental diseases or tooth degeneration, and a low d-aspartic acid to l-aspartic acid ratio in the dentin. which age range fits this skull?

a.25–50 years old

b. less than 10 years old

c.15–22 years old

d. greater than 50

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.

transformative rocks are the stones that emerge from the transformation of existing rock composes in a procedure called changeability, implies changing of structures. transformative rocks are shaped from alternate shakes that are changing a result of warmth or weight connected. one of this model is the earth developments that making rocks profoundly cover or crushed which will make the stones warmed and put under awesome weight. they are not softening but rather the minerals they are containing are changed synthetically that will shape transformative rocks. now and again different rocks are shaped when the others are near some liquid magma and getting warmed.