B. sulfur tetrafluoride + water → hydrogen fluoride + sulfur dioxide
<span>Transcription is the first step of gene expression, in which a particular segment of DNA is copied into RNA (especially mRNA) by the enzyme RNA polymerase. Both DNA and RNA are nucleic acids, which use base pairs of nucleotides as a complementary language.
</span>
Pulmonary vein. It enters your pulmonary vein and then enters your left atrium.
I hope that helped :)
The thermosphere keeps the earth from getting to hot frame the sun and it's the last layer so
the thermosphere