When there is a high concentration of positive transcription factors but a low affinity for the positive transcription factor
Transcription factors are proteins that regulate the transcription of genes—that is, their copying into RNA, on the way to making a protein.
Proteins called transcription factors, however, play a particularly central role in regulating transcription. These important proteins help determine which genes are active in each cell of your body.
<h3>How does transcription factors affect gene expression?</h3>
Under the influence of transcription factors, the various cells of the body can function differently though they have the same genome. Transcription factors attach to one or more series sites, which are called transcription element binding sites (TFBSs), binding to specific DNA sequences of the genes they control
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D - an increase in tree cover in the tundra.
it involved in the transfer of genetic material from one cell to another.
Asteroid<span>: a large rocky body in space, in orbit around the Sun. </span>Meteoroid<span>: much smaller rocks or particles in orbit around the Sun. Meteor: If a </span>meteoroid<span> enters the Earth's atmosphere and vaporizes, it becomes a meteor, which is often called a shooting star.</span>
A makes the most sense, though D could actually be an Ok reason, the other two aren't reasonable, a fire safety action? The door would be better open in a fire emergancy, it makes a quicker escape