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Activator protein binding is thought to cause DNA to loop out, bringing the activator protein into physical proximity with RNA polymerase and the other proteins in the complex that promote the initiation of transcription. Different cell types express characteristic sets of transcriptional regulators.
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Answer:
An earthworm is a tubular, segmented worm of the phylum Annelida. They occur worldwide and are commonly found in soil, eating live and dead organic matter.
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The style is the long tube that attaches the stigma to the ovary. Sperm from the pollen will travel down this tube to the ovules. The ovules, or eggs, are stored in the ovary until they are fertilized. Plants can only fertilize eggs of the same species.
