REM's are associated with dreaming. we spend the longest time in the REM stage. REM sleep is marked by a return to fast, irregular EEG patterns similar to those of stage 1. the brain is so active during REM it looks like the person may be awake
Biological soil crusts<span> are communities of living organisms on the </span>soil<span> surface in arid and semi-arid ecosystems. They are found throughout the world with varying species composition and cover depending on topography, </span>soil<span> characteristics, climate, plant community, microhabitats, and disturbance regimes.</span>
Answer:
The bacteria infected with viruses that had radioactive DNA had become radioactive. The bacteria that had been infected with viruses marked with radioactive proteins were not radioactive.
Explanation:
The rest of the answers:
1.2
2.3
3.2
4.1
5.b
The conditions depend on the density level of the snow.
Another reason is the imperfect data gathering especially if initial results are only gathered.
The third reason is that computer models still find it difficult to see small scale phenomena.
^^ and if the parent has a defect or disease or whatever the offspring are less likely to have it
