Consider this population of bacteria and how it has changed over time. darwin hypothesized that there are definite steps to natural selection. one is that the population is large. this species of bacteria was subjected to an antibiotic, yet the species survived. besides being a large population, what else must be present? a) randomness of traits b) the presence of mutagens c) variation within that population d) a very high rate of reproduction

The correct answer is option C) "variation within that population".

Explanation:

A population of bacteria will develop resistance to antibiotics for multiple factors. As stated, a large population is beneficial for the bacteria, because the more bacteria, the more likely will have a bacteria that has a random mutation that helps to survive the presence of the antibiotic. Other beneficial factor is that the population has variations in their genome. The more diverse the population of bacteria is, the more likely a bacteria will be genetically resistant to the antibiotics.

answer: c

explanation:

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.