I am quite sure this is supposed to be PHYSICS but anyways,
Whisper: Low Intensity, Less rarefactions and compressions
Shout: High Intensity, more rarefactions and compressions
These changes can be caused by environmental factors such as ultraviolet radiation from the sun, or can occur if an error is made as DNA copies itself during cell division. Acquired mutations in somatic cells (cells other than sperm and egg cells) cannot be passed to the next generation.
:333
The negative rna strandis the one directly repilicated
The answer is most likely: 'with an abundance of plant life without oxygen in the atmosphere '. The atmosphere contained almost no free oxygen during the Archean. It does not appear as if this epoch had an abundance of plant life, but rather mats of single-celled photosynthesising cyanobacteria. So I am not completely sure that either of the given choices are correct.
Some stars and constellations<span> never rise nor set, and they are </span>called circumpolar. ...Constellations<span> in the northern </span>circumpolar<span> sky include Auriga, Camelopardalis, Cassiopeia, Cepheus, Draco, Lynx, Perseus, </span>Ursa Major, and Ursa Minor. These constellations<span> are always visible in the night sky of the Northern Hemisphere.</span>
