Personally, I prefer to use Purell as it just makes your hands not too dry yet it kills 99.9 bacteria
The one that is not an intercellular communication would be : A message is distributed across plasma membrane
for this occurrence to happen, a cell doesn't has to interact with other cell, which also commonly described as intracellular communication
hope this helps
Definitely D!!!!! and NOT C
D. Only Bacteria can reproduce outside a host.
Just did the test on Apex on the lesson 2.5.2