Bill Nye: The Atmosphere
Name
|_
Date
Period
1. The ozone layer blocks out
light.
2. We live in an
of air.
3. The atmosphere acts as a
warm.
to keep the Earth
4. The lowest and thickest layer of the atmosphere is the
The ozone layer blocks out what light?

Ras is a g-protein that is activated when a growth factor attaches to egfr. its activation results in the replacement of a gdp molecule with a gtp molecule, thus allowing a signal transduction pathway to be activated. considering the signal pathway illustrated on this page, what is one potential outcome of a mutation in the ras gene that leads to ras protein hyperactivity. be specific.