Which of the following statement is true?

a. a cell's phenotype is determined by its dna and its genotype is determined by its proteins.

b. a cell's genotype is determined by its dna and its phenotype is determined by its proteins.

c. a cell's genotype is determined by its dna and its proteins.

d. a cell's genotype and phenotype are determined by its proteins.

there are so many examples for that in different areas, like biology experiment carried out in our lab recently.

here's one link:

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.

the titanic would be the correct answer