A geneticist finds that a strain of bacteria to produces a non-functional sigma factor. Which among the following steps in transcription would most likely be first affected? Assembly of RNAP onto the DNA strand
Identification and binding of RNAP on to the promoter sequence
Conversion of open initiation complex to closed initiation complex
Synthesis of RNA after the formation of open initiation complex

The type of rock she find is a sediment rock

Ais the

Mars and earth have quite a few things in common. both are  terrestrial planets, both are located within the sun’s  habitable zone, both have  polar ice caps, similarly  tilted axes, and similar  variations in temperature. and according to some of the latest scientific data obtained by rovers and atmospheric probes, it is now known that mars once had a  dense atmosphere  and was covered with  warm, flowing water.