Are you (an animal) more closely related to the mold in your shower (a fungus) or the oak tree outside your window (a plant)?

You (or an animal) are more closely related to fungi. This has been determined through molecular phylogeny analysis.

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation:

this protocol provides a detailed procedure for co-immunoprecipitation (co-ip) to identify protein–protein interactions.