Ok Sickle cell Anemia is caused by a point mutation known as a substitution. Show what would occur if the First T Tymine DNA base in the portion shown above experienced a mutation with a substitution of A adenine

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.

if you listed your answers right then i believe your answer is b.