<span>since the vast majority have never been studied in the laboratory and have only been detected by analysis of their nucleic acids in samples from the environment. Although archaea have, in the past, been classed with bacteria as prokaryotes, this classification has been described as outdated, since it fails to distinguish between the three very distinct domains of life.</span>
I think it is A as it's a desert it needs excessive sunlight as the animals have adapted to it.
Small segments of dna that can move from one region of a dna molecule to another are transposable elements or "transposons"
I don't know answer to this question, but I can explain what it wants for you to name, if that would helped you.
It says that you have to find 4 doings of bacterias (micro-organisms) in the organ system for digestion.
When earth worms bring fine rocks to particles they do it in mechanical weathering
