<span>1. The references are not cited. Ie. It is unclear or unknown where the information came from.
2. The information is based on studies which are not peer-reviewed. Ie. The information has not been reviewed by experts in he field, or is not supported by a consensus of experts in the field.</span>
1st defintion: Gene expression.
2nd definition: Transcription.
3rd defintion: Lac operon.
4th definition:
5th definition:
6th definition:
D. greenhouse gases is the answer
The Sun's outer gases extend far beyond the photosphere (Figure 6). Because they are transparent to most visible radiation and emit only a small amount of light, these outer layers are difficult to observe. The region of the Sun's atmosphere that lies immediately above the photosphere is called the chromosphere.
