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Arisa [49]
3 years ago
15

Chemical messengers that are produced in one location in the body, released into the blood, and travel to other locations, where

they elicit responses
Biology
1 answer:
Nimfa-mama [501]3 years ago
5 0
I don't know weekend to
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A = Activator

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An activator is a protein which typically binds to a short (50–1500 bp) region of DNA which might be located either upstream (mainly) or downstream of a gene so as to cause increased transcription. This particular region of DNA is known as enhancer and activator is also  known as transcription factor. Activator is a trans-acting factor which binds to the cis-acting factor which is enhancer so as to enhance transcriptional expression.

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hypothalamus.

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Which is a difference between plant populations in primary succession and secondary succession?
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C.  Pioneer species in primary succession only grow in aquatic environments, while pioneer species in secondary succession only grow on land.

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