They are sandwiched between two layers of heads. Recall that the heads are hydrophilic therefore they will always be on the outside and the tails are hydrophobi therefore they willl always be away from water, there fore sandwiched. I'm a bio major, hope I helped :)
The olfactory system is involved in the sense of smell. The receptors of smell are not routed through the thalamus. The signals id directly routed from the olfactory bulb to the olfactory cortex and thalamus is not contacted in between. This is the difference between the taste and smell receptors, although both of their receptors are stimulated from mucus/saliva in the mouth.
In comparison to eukaryotes, prokaryotes are smaller. Eukaryotes and prokaryotes<span> are type of cells. The prokaryotes </span><span> contain no membrane-bound organelle such as</span><span> nucleus and are found in the domains of Bacteria and Archaea. E</span>ukaryotes contain a nucleus and make up the remaining domain. Prokaryotes tend to be much smaller in size than eukaryotic cells.
DNA is pretty much a blueprint for how cells should work. So DNA tells the ribosomes in the cell to make protein.
Sorry if this answer is incorrect, I'm just starting to learn about this :(
