The diagram below shows the different paths nitrogen can take in the nitrogen cycle. Below are some of the steps of the nitrogen cycle. Use three of the steps to show a possible way nitrogen can move through an ecosystem.

Here are the tiles (only 3 will be used)

Nitrates

Assimilation

Atmospheric

Ammonium

Ammonification

step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.

not: both offer magnification to the atomic level.

the answer is c because it is most logical.

the answer is d. none of the above