Natural selection favors copper tolerance in all soils near the old mine, not only in the contaminated soils. nearly 100% of monkey flowers growing in copper-contaminated soil are copper tolerant. copper contamination in the soil created copper-tolerant plants.

1. if you were to test monkey flowers growing on the shore of the lake, you would expect nearly 100% of them to be copper tolerant.
2. copper-tolerant plants are found only in contaminated soils.
3. the population that existed before mining must have included both copper-tolerant and copper-intolerant plants.

The population that existed before mining must have included both copper tolerant and copper intolerant

Explanation:

Natural selection is a form of evolution where individuals having a certain variation gives them an advantage at survival and reproduction compared to the ones that do not have the variation.

For natural selection to occur, the variation should initially be present in the population.

Therefore, for this population of Monkey flowers growing in a copper -contaminated soil.  The population must have included both the copper tolerant and the copper intolerant plants before mining.

what's the question ?

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.