ASAP 10. A study was conducted on the population size of grass eating animals
observed in the Great Plains of the United States. The graph below
shows changes in organism numbers over a 7 year period. Which
statements most likely explains the changes that have occurred over this
7 year period.
200
Number of Organisms
150
100
50
A. The population began to stabilize during year 4.
B. A new predator was introduced to the population during year 2.
C. Between years 1 and 2 an increase occurred due to the emigration
of additional organisms.
D. Between years 3 and 4 there were an equal number of births and
deaths occurring within this population.
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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.

easy

explanation: