Chris lives in a city that experiences heavy rainfall with average annual precipitation of 882 millimeters. It is warm all year.

Mark lives in city with an average annual rainfall of 40 millimeters. It has hot summers and cool winters.

Chris’s city is in a 1

climate, while Mark’s city is in a 2 climate.

Pick one from each section

1. answers

dry, moderate, tropical

2. answers

dry, polar, tropical

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.

allowed for the prediction of the properties of missing elements.

the answer is :