WHOEVER HELPS WITH THIS I WILL GIVE THE ''BRAINLIEST'' Many different chemicals have been produced and widely used by society for the benefit of humans. However, often times the chemicals have negative impacts on ecosystems. In paragraph form answer the following: Should chemicals continue to be used despite their impacts on ecosystems? Justify your answer and explain how three chemicals may impact (positive and negative) ecosystems and/or biodiversity of an ecosystem. (/7)

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.

i believe the answer would be b. hope it : )

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