Which statement about an individual that is homozygous for an allele is not true?

a. each of its cells possesses two copies of that allele.
b. each of its gametes contains one copy of that allele.
c. it is true-breeding with respect to that allele.
d. its parents were necessarily homozygous for that allele.
e. it can pass that allele to its offspring.

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.

is this a psat question, if so do not cheat try your best.

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products

cells spend most of their time in interphase