The Atomic weight is <span>22.989769 ± 0.00000002 u</span>
The correct answer is A, D, E.
A. Cambrian.
D. Permian.
E. Silurian.
Triassic period was termed as the period for the mesozoic era. This time period followed extinction of great mass which founded at the end of period of permian.
It is during the period of triassic when first mammal and dinosaur appeared.
During late permian, plants like horsetails and mosses were extinct.
Those plants which evolved in on the of triassic were cydophytes and confers.
Answer:
sigma subunit
Explanation:
Sigma subunit of RNA polymerase holoenzyme directs the enzyme towards the consensus sequences present upstream of the transcription start site. Completion of the initiation phase of transcription is followed by dissociation of sigma subunit from the transcription complex.
The protein NusA replaces the sigma subunit. The RNA polymerase leaves the promoter and starts the elongation
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