Oxygen and carbon dioxide move across a cell membrane due to diffusion. Diffusion is a passive process as it requires no energy to move particles down the concentration gradient.
Yes you're correct. It is the outermost part of the atmosphere, artificial satellites are in that layer.
Answer:
A histone modification mechanism proliferate through a process that includes post translational modification procedure. The methylation, acetylation as well as ubiquitylation are one of the main modifiers that help in activation of silent genes and ultimately these covalently bonded histone modifiers help in regulating chromatin. The PTM has a main role in altering histone structure by these modifier's recruitment....
Permeability?
I feel like this question could be subjective... but this is my best guess
I think its a clastic sedimentary rock with angular particles
