The right answer is A) Uses H2S for an energy source.
Beggiatoa is a bacterium that lives in sulphide-rich environments. They use H2S as a source of energy.
Purple sulfur bacteria, are also bacteria that depend on the presence of H2S but do not use it for the purpose of producing energy. They use it as the ultimate electron acceptor in its respiratory chain (instead of oxygen), since they are anaerobic bacteria.
The process of constructing an mRNA molecule from DNA is know a transcription. The bases pairing rules ensure that the DNA code is conserved in the sequence in the mRNA
Answer:
<em>the seasons in the northern hemisphere are the opposite of those in the southern hemisphere </em>